bump to Gotham 13.1 beta2
deinitialize CAnnouncementManager before stopping all (network) services

partial backport of e2693c5cb5320cede4d4dd884059c4574366eef1 and b348974a3fd13d3bd6d02e308037b0862f4c8ea0.
Re-factored FileItem to support IsResumePointSet() and GetCurrentResumeTime()
Re-factored FileItem to retrieve fresh resume data for recordings from the PVR server
Re-factored GetResumeString to not insert a bookmark in the video db, it is never used
Merge pull request #4630 from Red-F/gotham-resume-pvr-lastplayedposition

FIX resume playing PVR recordings from the exact lastplayed position
Merge pull request #4695 from Memphiz/badaccess

[airplay] - fix possible bad access as reported in
[upnp] properly hide the addons node
Merge pull request #4730 from Montellese/gotham_announcement_fix

deinitialize CAnnouncementManager before stopping all (network) services
Merge pull request #4700 from MartijnKaijser/13.1b2

13.1b2
Revert "demuxer ffmpeg, workaround for broken probing of flac format", unneeded for ffmpeg2.2/gotham-improved

This reverts commit b38ec398546e87679f94e829eb87ed5f71a05149.
Revert "VDPAU: improve error handling, Gotham"

This reverts commit 55030587d56f54a56655fd9ad7e419e4077b7e57, which conflicts with the ffmpeg2 variant.
[depends] move ffmpeg to unified deps
[configure] remove internal ffmpeg
remove ffmpeg from tree
ffmpeg: remove dll wrappers
add ffmpeg lock manager
todo: refactor to own file
ffmpeg: move callbacks into separate file
remove ffmpeg dlls from generated headers
not removing win32 as this might still be needed?
[rpi] setup-sdk.sh: allow overriding of buildroot and xbmc install paths
also don't require root if not needed