[vfs] CFile: remove 'virtual' from destructor
no class is derived from CFile
load replaygain tags on mp4 style files
load tags when opening file so they are available when we try to read replaygain

provide a fallback file type to tagloader based on content

pass content type to DVDplayer for types that support tags, in order to set a fallback filetype
[vfs] remove win32 code from SmbFile.h/.cpp
[vfs] remove win32 code from SMBDirectory.cpp
[3d] added 3D subtitle depth
[pvr] fix view mode not being set properly after channel switch under certain
circumstances
[pvr] Fix missing recordings

This fixes an issue with missing recordings that occurs under following
circumstances:

- Recording A in subdirectory "TV Show XY"
- Recording B in subdirectory "TV show xy"

Because of the difference in case, recording B won't show up in any
sub folder. This can happen due to EPG inconsistencies.

The presented sub folders are created with case-insensitive matching
using CFileItemList::Contains in GetSubDirectories.
But when determining if a recording belongs into a directory, the
comparison is case-sensitive (in IsDirectoryMember).

This commit changes the IsDirecroryMember check to be case-insensitive.
[rbp/omxplayer] Avoid segfault when switching fullscreen

Switching fullscreen causes a brief UnregisterAudioCallback/RegsisterAudioCallback.
If this occurs while audio thread is inside VizPacket then we segfault on dereferencing m_pCallback.

Using the m_critSection lock means the higher level test for m_pCallback will protect us.
renderer: add underlying support for 16bit textures on gles
renderer: move UploadYV12Texture to same location as in GLES renderer

Simplifies diffing
renderer: match GLES UploadYV12Texture structure with GL version
renderer: calculate source rect on upload GLES:EGL/CVRef/MediaCodec
[dxva] added dxva-hd renderer as alternative native dxva.
vdpau: move cropping of top and bottom lines to renderer
fixup! renderer: calculate source rect on upload GLES:EGL/CVRef/MediaCodec
renderer: factor out logic for upgrading GL format to 16bit
fixup! renderer: add underlying support for 16bit textures on gles
[pvr] support for past epg data in timeline view
[epg] fix: incorrect return value in GetSelectedItem()