libmediaart: Fix includes
libmediaart: Replace GetFileInfo for FileInfo and use getter/setters
libmediaart: Remove Tracker code and simplify it
libmediaart: Removed queue.[ch] and created cache.[ch] more aptly named
libmediaart: Don't depend on tracker file utils to get file mtime
docs: Added initial documentation
libmediaart: Added, fixed, cleaned up documentation in sources
libmediaart: Merged utils.[ch] into cache.[ch]