videodb: don't reset the source path if it is temporarily offline
videodb: add GetSourcePath() to get the path of the source another path belongs to
videodb: use the proper source path when checking for a temporarily offline source during library cleaning
[win32] update readme
Merge pull request #4795 from Montellese/videodb_clean_fix

videodb: fixes for support of temporarily offline sources during library cleaning
videoplayer: adapt lateness detection and dropping to buffering
video player: present correct pts to user for a/v sync (after buffering in renderer)
videoplayer: some rework and documentation
renderer: bump buffers to 5
videoplayer: update frametime, it might change due to fps detection
videoplayer: give streams with invalid fps a chance for fps detection
dvdplayer: allow rewinding at end of stream, do a seek after rewind
dvdplayer: observe pts counter overflow
dvdplayer: avoid short screen flicker caused by unnecessary reconfigure of renderer
vdpau: advanced settings for auto deinterlacing
player: fix rewind
OMXPlayer: some caching fixes for pvr
fix incorrect display of fps when dr kicks in
renderer: allow some lateness within vblank interval
ActiveAE: slightly reduce buffer size