Scene items would incorrectly have pre-multiplied alpha when they were
scaled with different scale filtering, when they were cropped, or when
the item itself was a scene.  This happens because the scene renders the
items to a texture in those cases, and when they are rendered to a
texture the blend function would be the default srcalpha/invsrcalpha
blend function, which would cause alpha to become pre-multiplied in the
texture's result rather than straight alpha.

This changes the behavior to directly copy the color/alpha to the
texture using the one/zero blend function instead, which makes the
resulting texture straight alpha.  (Note that you do not want to turn
off the blend mode for the same result because certain sources can have
custom drawing that may rely on blending being available)

Related Issue: https://obsproject.com/mantis/view.php?id=954

Closes jp9000/obs-studio#966

This allows the ability for certain types of modules (particularly
scripting-related modules) to initialize extra data when all other
modules have loaded.  Because front-ends may wish to have custom
handling for loading modules, the front-end must manually call
obs_post_load_modules after it has completed loading all plug-in
modules.

Closes jp9000/obs-studio#965

Addresses Mantis issue 927 by adding the --multi/-m flag to suppress the
warning dialog.

Closes jp9000/obs-studio#964

When exporting scene collections/profiles existing files are
not overwritten.

Closes jp9000/obs-studio#963

rtmp-services: Update Twitch ingests

Allows using a video file as a means of transitioning, transitioning two
targets at a specific time during the video playback.  Audio for target
A fades out to the transition point, and then audio for target B fades
in after the transition point.

Allows getting the duration of a video via the proc handler of the
source.

For specific types of transitions (stingers in this case), there is no
blending done of the two targets, so wasting GPU resources rendering
them to textures is unnecessary.

* Update URL of SFO ingest and moved it to proper position in list
* Added Portland

The invalid format version warning for service files is an unnecessary
warning which isn't necessary to display because it'll automatically
fall back to the distributed version over the cached remote version.

It's erroneously including an entire directory, including a file that no
longer exists, and the obs-outputs_HEADERS variable had a typo when used
in the add_library call.

Allows an output to automatically specify which audio codec it requires
and use it instead of AAC.  This change is intended to be
behind-the-scenes and seamless to the user.

Allows a service to specify the output it needs in order to function as
configured.

NOTE: This functionality should be considered temporary as a seamless
means of implementing support for different output types within the same
service.  Ideally, different services should be used for this
functionality.

Allows the ability for services to specify a different output if needed.

NOTE: This should probably be considered temporary, and services within
this file that use this functionality should probably be moved out of
the file and in to a separate service.

Allows the ability to override bframes (useful for specific protocols)

Allows the ability to change the output type in case one service
requires a different output type.

NOTE: This should be considered a temporarily yet simple solution to a
specific problem: support for RTMP-like outputs.  This will allows
seamless integration of supporting different RTMP-like output types
within the same service.  This should probably be replaced with a more
ideal solution later, such as implementing a completely different
service type instead, when time permits.

(This commit also modifies obs-outputs)

Closes jp9000/obs-studio#945

Deprecates "Theme" global config value and uses "CurrentTheme" instead
to ensure backward compatibility with older versions of OBS, which will
fail to load if you have a theme that isn't available.

(Jim Edit: Putting this back because I misunderstood the purpose of
jp9000/obs-studio#936)

Closes jp9000/obs-studio#936

Closes jp9000/obs-studio#738

UI: Add new theme, update theme capabilities

obs-qsv11: change re-enter lock implementation

obs-text: Fix file reader occasionally not updating

libobs: Fix an int underflow in log_frame_info

plugins: Clear warnings about -Wincompatible-pointer-types

Adds the ability to zoom into the preview when fixed scaling mode is
enabled.

(Edit by Jim: Also now saves zoom and scroll position)

Closes jp9000/obs-studio#917

(Edit by Jim: Added a check to make sure that the browser source exists
due to the fact that it's technically optional)

Closes jp9000/obs-studio#905