changed: Auto extract thumbs/flags for webdav
GUIEpgGridContainer: validate scroll offsets as well as they are used to calculate rendered blocks
GUIEpgGridContainer: don't select first item on mouse/touch event on empty programme block
GUIEpgGridContainer: don't react on clicking channel list
GUIEpgGridContainer: add panning gesture
GUIControlGroupList: add panning gesture
Add media parameter to Playlist.Item directory type

Allow complete control from remote of the media to add, now permit a correct Player.Open on directories with mixed items.
Also permit to have metadata loaded when files are added from Player.Open
Forcing a wrong type for a specific playlist return an invalid params.
Now also authorize to queue videos to pictures playlists
[Python] Adds autoclose to python's yesno dialog.
GUIWindowPVR: don't spawn dedicated thread just to invalidate channel items every 5 seconds. Instead run CStopWatch when activating channel window, check if 5 seconds elapsed and then inavlidate window and reset watch.
[ffmpeg] fix: patch needs to operate from lib/ffmpeg
Add python-imaging dependency its been a ppa dep since 2011

Add zlib1g-dev Readme.ubuntu since has been part of ppa deps for a while too
and its part of readme.linux.

Full A-Z Alphabetical sort on both readmes's as per wsnipex comments

Squash all into 1
Remove unused variable in GetDirectory()
fixed: The db check for streamdetails was wrong
changed: Improve comment
fixed: Streamdetails & resume-bookmark saving etc. for bluray eg. folders didn't work (fixes #14288)
dvdplayer: check for successfull extradata allocation
dvdplayer: cosmetic removal of trailing blank
CoreAE: fix crash on app exit due to race condition

We must unregister callback before shuting down AE, and also re-check
that we are not shutdown in the callback after taking lock
[win] fix typo in message
[release] version bump to 13.0 alpha4 as we start new merge window.