[Docs] Add some more packages to SD build docs.
Merge branch 'master' of github.com:FalconChristmas/fpp
[ChannelOutput] Give another chance to start output thread

If we're trying to start the channel output thread and it is
already running, check twice in case it was in the process
of stopping.  This should fix a race condition between one
sequence ending and another starting.
[Sequence] Fix race condition causing channel data blanking to not work

Sometimes the blanking routine would not work because we were still
sending the previous data.  This commit adds a delay in the blanking
routine to make sure all previous data has been sent since this
function is sometimes called outside the normal channel output thread.
[Playlist] Fix bug in playlist stage change processing

When a playlist ended by itself as a result of calling
PlayListPlayingProcess(), we were not detecting the state change
to the idle state and properly cleaning up the playlist.  By
separating the not-Idle and Idle if statements, we will catch
the new Idle state and act accordingly.  I believe this fixes
a couple issues which have been discussed recently.
Merge branch 'stage' into v0.4.0
[Core] Commit new binary to release branch