Fix Channel preplay not showing when Container.Content is "channel". Fixes plexinc/plex#966

Yet another strange channels case, but hey.
Position the filters to welcome back "Recently Viewed". Fixes plexinc/plex#922
Degrade gracefully if VideoPlayer item has no plot or art. Fixes plexinc/plex#964
Added Container.Property(PlexPreplay) to debug layer.
Proper separation of Preplay levels for view types. Fixes plexinc/plex#942
Show Episode plot in episodes list views, instead of Show plot. Fixes plexinc/plex#913
Positioning tweaks.
Fix another case of Channel preplay not showing when Container.Content is "channel". Fixes plexinc/plex#966 (again).

This time it’s in combination with ListItem.Type(movie).
Don't show left side menu in Channels.
Adding upstream and taking out __PLEX__ options.
Merge pull request #981 from ziggimon/ext-ffmpeg-fix

Fixing DllAvCodec class for external ffmpeg
Change nightlies url to plex.tv
Windows got annoyed by not having CA's installed.
Revert "Bump windows sqlite3 package."

This reverts commit 51f8bec8fa95d4d13aa501d99076c86e93dee9b2.
Revert "Bump windows deps"

This reverts commit a29de96d27b1ceb01d77c4f442485c64af7798e9.
Revert "Fix newer microhttpd compile on Windows"

This reverts commit 1f5bf74943d870b7ed43363cd584a9da18816434.
Make sure delayload stuff gets called.
Revert "Upgrade libmicrohttpd"

This reverts commit b50c725b8679898d847683845f7bc7084f18bee6.

Conflicts:
	project/BuildDependencies/scripts/libmicrohttpd_d.txt
Merge remote-tracking branch 'plex-skin/master' into frodo

Conflicts:
	addons/skin.plex/720p/LeftSideMenu.xml
Bah, fix Property("PlexPreplay") correctly.

Fixes #972