added chromecast messaging
add activity log feature
Update ExternalPortForwarding.cs

I have edited this file just to share some info and opinions about it related with Mono.Nat. I hope you find them useful.
Merge pull request #891 from lontivero/patch-1

Update ExternalPortForwarding.cs
update translations
implement removing from playlists
add collages for playlists
Merge branch 'master' of https://github.com/MediaBrowser/MediaBrowser