CHG: [droid] Do not pause music when going to background
[omxplayer] Don't flush queued data on general reset

We were flushing the queue of data to gpu (which can be a number of seconds worth) on a general reset.
However this is generated on inoccuous events like a chapter change in dvd playback.

This results in a few seconds loss of audio, and a temporary audio/video sync error
[UX] consistent playback behavior for music and video
[pvr] apply the view state handling on a per window basis

As reported in our forum at http://forum.xbmc.org/showthread.php?tid=175135&pid=1776697#pid1776697 the view state handling depends on the current selected group. This changes the handling to be on a per window basic instead.
ADD: Freescale i.MX6 h/w codec
ADD: [imx] native framebuffer support
increase ABI for the GUI to 5.3.0 and break backwards compatibility with Gotham
[win32][Fix] Set hDeviceNotify to 0 after a successful UnregisterDeviceNotification call.
FIX: prevent switching to windowed mode on windowing system not actually supporting it
FIX: do not mark resolution as changed if it didn't
smartplaylist: handle FieldAlbumArtist the same as FieldArtist for musicvideos
smartplaylist: only allow fields for mixed playlists that are available for both musicvideos and songs
smartplaylist: improve/fix editing mixed smartplaylists
IFile and CFile: add doxy for Stat() functions
[win32] WIN32Util::ConvertPathToWin32Form: add overload to use CURL& as parameter
[win32] WIN32Util: add fileTimeToTimeT() helpers
Merge pull request #5255 from xhaggi/pvr-apply-view-state-on-a-per-window-basis
[win32][vfs] Implement new CWin32File class for local files on win32 platforms
* rewritten from scratch
* added a lot of validity checks and results checks
* correctly handle all over/under sizes of variables
* automatically hide files in filesystem with name staring from dot
* fixed bug - Write didn't update i/o pointer
* always return real current file size instead of cached value
* reimplemented Stat() better than common runtima stat() (more accurate time values, set real number of hard links, better set _S_IEXEC attribute etc.)
[win32][vfs] FileFactory: switch to new CWin32File class; remove HDFile from win32 project
[keymap] don't overload <space> key (pause action) with playlist functionality and rather use <n> for this like already on other places