The core itself now provides reconnection options (enabled by default, 2
second timeout between reconnects, 20 retries max until actual
disconnection occurs).  This will make things easier for both module
developers and UI developers.

Reconnecting treats the stream as though it were still active, and
signals are sent when reconnecting and upon successful reconnection.

Need to implement user interface information for reconnections.

Use warn/info/debug helper macro functions to output
warnings/information/debug log data that's preformatted to include the
module and the current output name.

This will get the user-defined name of the output (if any)

Like with other plugins, a macro is ideal for preventing typos and
misspellings of the setting.  Also, add a property for drop threshold.

Might come in useful for debugging issues later on.

This implements the 'frame skipping' mechanism to forcibly cause frames
to be duplicated in order to reduce encoder complexity so the encoder
can catch up to the video, otherwise it will continue to be
progressively behind and will cause a desync of the video.

Typically, if a user gets this issue, they should turn down their
settings.  For the love of god do not tell them that 'frames are
skipping', just tell them that CPU usage is high, and that they should
consider turning down their settings.

Update fi.txt

Contains Move Up, Move Down, Move to Top, Move to Bottom.  Also assigns
Ctrl-Up, Ctrl-Down, Ctrl-Home, Ctrl-End to each action.

This was also added to the right-click context menu popup for sources.

The removeItemAction just for a keyboard shortcut was unnecessary.
Instead, use the toolbar button to associate a shortcut with, and remove
the removeItemAction object.

Require correct cmake version everywhere

I screwed it up a bit originally, using && instead of ||.

Use 'trimmed' function to prevent sources with leading or trailing
whitespace.

Also, do not allow an empty value.

The current renderer should be a global config setting, not a local
setting.

This allows the popup to be appended directly as an item for other
popups.

I realized that there's no other way to share the menu if I want to add
it as a sub-menu somewhere else.

This seemed to happen if the 'file' variable was NULL.  For some reason,
magickcore would just totally freeze.

cmake support for ImageMagic vs. libavcodec

Compatibility with older FFmpeg versions may be broken if the av_frame_*
functions are used instead of the avcodec_* equivalents.

Implement image file support

...We really need to make this search for modules and automatically load
them.

A simple plugin that does nothing more than display an image file as a
source.

MagickCore is provided here as an alternative to FFmpeg in case FFmpeg
is not easily supported (for example, debian-based linux distros).

NOTE: Cmake configuration needs to be changed in order to allow
MagickCore image support.