Adds an option to enable/disable blocking hotkeys when the window is in
focus which is normally used in order to prevent hotkey/shortcut
conflicts.  This does not apply to the settings window; the hotkey
behavior is unchanged with the settings window (in order to prevent
hotkeys from being used while setting hotkeys for example).

Closes obsproject/obs-studio#1267

Add a new algorithm to calculate the true-peak. It implements the
Whittaker- Shannon interpolation from four samples to create 4
intermediate samples (5 x oversampling) inbetween the middle two
samples.

With 4 samples and 4 intermediate samples the algorithm can be
implemented as a 4x4 vector-matrix cross product, which is ideal for
SSE.

I've also replaced the sample-peak algorithm using SSE as well to
improve performance.

Closes obsproject/obs-studio#1189

Adds the ability to upload crash reports, making it easier for users to
give us crash data.  This should be considered a temporarily solution,
as automated crash reporting should be the ideal solution as soon as
time permits.

The decay rate of the audio meters can now be selected in the audio
settings.  The values are:

- "Fast"   (OBS default, 40 dB / 1.7s)
- "Medium" (Type I PPM,  20 dB / 1.7s)
- "Slow"   (Type II PPM, 24 dB / 2.8s)

Closes jp9000/obs-studio#1143

Moves the multiview (fullscreen/window) options to the view menu to
reduce context menu clutter, and allow using it even when not in studio
mode.

Also adds missing translation strings.

Jim note:

- Refactored code significantly
- Added a context menu option to exclude specific scenes from projectors
- Made it so multiview projectors update when scenes are
  added/removed/renamed
- Increased text quality
- Removed the color sources and replaced them with simple solid
  rectangles
- Increased the border size of "program" and "preview" scenes in the
  lower scene list

Closes jp9000/obs-studio#1068

Allows the ability to override what specific transition a scene may use
when transitioning to it.

(Original proposal by cg2121, reworked by Jim)

Closes jp9000/obs-studio#1052

This commit adds a checkbox to general setting to allow users to enable
a vertically oriented layout for studio mode.

This commit addresses mantis issue 827:
https://obsproject.com/mantis/view.php?id=827

Closes jp9000/obs-studio#1072

This commit allows a user to create projectors for the preview scene
instead of the program/live scene.

Close jp9000/obs-studio#1071

This adds the ability to switch to a scene by double-clicking it when in
studio mode.

(Edit by Jim: In case this change is undesired by the user, this has
been changed to be an option in general settings; disabled by default)

Closes jp9000/obs-studio#1029

(This commit also modifies the following modules: UI,
deps/media-playback, coreaudio-encoder, decklink, linux-alsa,
linux-pulseaudio, mac-capture, obs-ffmpeg, obs-filters, obs-libfdk,
obs-outputs, win-dshow, and win-wasapi)

Adds surround sound audio support to the core, core plugins, and user
interface.

Compatible streaming services: Twitch, FB 360 live
Compatible protocols: rtmp / mpeg-ts tcp udp
Compatible file formats: mkv mp4 ts  (others untested)
Compatible codecs: ffmpeg aac, fdk_aac, CoreAudio aac,
		   opus, vorbis, pcm (others untested).
Tested streaming servers: wowza, nginx
	 HLS, mpeg-dash : surround passthrough
Html5 players tested with live surround:
	 videojs, mediaelement, viblast (hls+dash), hls.js
Decklink: on win32, swap channels order for 5.1 7.1
         (due to different channel mapping on wav, mpeg, ffmpeg)
Audio filters: surround working.
Monitoring: surround working (win macOs linux (pulse-audio)).
VST:	 stereo plugins keep in general only the first two channels.
	 surround plugins should work (e.g. mcfx does).
OS: win, macOs, linux (alsa, pulse-audio).
Misc: larger audio bitrates unlocked to accommodate more channels
NB: mf-aac only supports mono and stereo + 5.1 on win 10
         (not implemented due to lack of usefulness)

Closes jp9000/obs-studio#968

This adds the ability for users to change the names of audio sources
from the mixer including desktop and mic/aux sources.

Closes jp9000/obs-studio#1055

Allows the ability to hide/unhide sources in the mixer that the user
doesn't care about or doesn't necessarily want to see (such as video
sources that have audio but don't have any audio playing).  If all
sources are hidden, the user can right-click the mixer's empty area and
choose "unhide all" via a context menu.

Closes jp9000/obs-studio#1002

Changes the UI to an adjustable user interface, allowing the user to
fully customize how the scenes list, sources list, the mixer,
transitions, and the buttons are oriented on the main window window.

This adds a "Defaults" button in the source and filter properties, which
will clear and reset all settings.

Closes jp9000/obs-studio#875

(Edit by Jim: Removed "Fullscreen Preview" because that's already sort
of served by the normal fullscreen projector option via the preview
context menu)

Closes jp9000/obs-studio#846

Uses a named mutex to detect if multiple instances of the program are
open, and if so warns the user.  When running in portable mode, uses a
separate unique mutex name mapped to the user's config directory to
ensure that no two portable builds use the same config directory.  This
way, portable builds do not conflict with normal builds or other
separate portable builds.

Shows performance stats, and streaming/recording stats, and helps warn
the user when they have less-than-optimal values with coloring on the
values (e.g. yellow when getting low on disk space, red when getting
really low)

The auto-configuration wizard is designed to allow first-time or
novice/uneducated users or to set up video and encoding settings in a
very quick and easy way.  It'll automatically perform a bandwidth test,
and/or test the user's video settings to determine the most ideal
settings for streaming and recording (assuming a 1-pc setup).

The colon makes it difficult to use these locale items for other
purposes, and the colon isn't used much elsewhere, so just remove them.

Closes jp9000/obs-studio#841

The audio subsystem of windows is by default configured to lower the
volume of other things while a communications device (mic) is currently
active.  This patch prevents that from being enabled with OBS.  If the
user needs audio ducking enabled again for whatever reason, there is now
an option to re-enable it in advanced settings.

Closes jp9000/obs-studio#884

Closes jp9000/obs-studio#860

Closes jp9000/obs-studio#804

Closes jp9000/obs-studio#804