adds osx library name to addon.xml
fix reading of level setting (integer)
don't write if our buffer isn't setup yet
adds a temporary buffer for writing metadata etc. on init before our buffer is sent to is in Encode
fix tracklength - caused segfaults if specified far too small (iTrackLength is in seconds)
mayaswell use the specified encoding rates/channels/bitdepth
Merge pull request #2 from jmarshallnz/master

Various fixes for the flac encoder