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
AE: add S24NEMSB and treat S24NE4 with bit in lower 3 bytes
AE: Explain the conversion between SNE24NE and SNE24NEMSB
AE: remove convert function from ActiveAESink
ActiveAE: remove convert functions from input stream
AE: drop obsolete AEConvert class
AE: drop unneeded format AE_FMT_S8
AE: drop obsolete class AERemap
AESinkPULSE: Clean all BigEndian and LittleEndion Formats
WASAPI: fix audio formats