Add "busydialogdelayms" advanced setting.

Provides control over the delay until busy dialog is shown when starting
video playback.
Added a boolean condition to identify the Raspberry Pi platform (System.Platform.Linux.RaspberryPi)
PVR: Resolve channel dummy in GUIWindowPVRTimerSettings

When using Backend channel number , use channel unique ID member instead channel number
PVR: Cosmetics in GUIWindowPVRTimerSettings
remove old unused renderer files
Show values of string settings with button controls
Defer demuxer pause until buffers full
[GUIInfoManager] Add VideoPlayer.AudioLanguage infolabel.
[DVDPlayer] Set CMediaSettings::Get().GetCurrentVideoSettings().m_AudioStream on open/set.
add audio and subtitle language info to video osd if available
changed: Make network buffer more flexible/configurable
changed: Move read cache logic from DVDPlayer to CFile
fixed: Tab -> space
Fix memory leak in SurfaceFlinger.

Call native_window_api_disconnect to free the memory used by OMX video decoder.
Or, there is memory leak in SurfaceFlinger after a stream playback is stopped.
[win32] Use more VC optimizations for important XBMC parts for 'Release' config
* Enable 'Full' code optimization
* Prefer speed over small size
* Allow any suitable inline function
* Enable Generate Intrinsic Functions
* Enable Function-Level Linking
* Enable 'Whole Program Optimization' for compiler, linker and lib task
* Explicitly enable linker optimization /OPT:REF and /OPT:ICF
[win32] Fix various linker warnings
[Players] Avoid jumping volume to maximum after trickplay
For players that control volume, if the speed changes (e.g. with ff/rew) the volume gets reset to maximum.
This change sets it back to current value, although I question why it is being changed at all.
Do any players require muting during trickplay?
[win32] PeripheralBusUSB::PerformDeviceScan: rename parameter for clarity
[win32] PeripheralBusUSB: declare constant values as "const"
Values not supposed to be changed is better to declare as "const" to allow compiler optimize better.
[win32] PeripheralBusUSB::PerformDeviceScan: check for real memory allocation