Fixes an unclosed file warning
Extends quantizer to quantize release_date

Turns release_date:2012-08-09 into year:2012
Renames parser_settings to parser_options

Now matches the documentation
Handles the rare None value from a metadata
Outputs a happier message for invalid cache
Adds symlinks in sorted order
Adds default and override settings
Adds a freebase plugin
Removes some dead code from copying another plugin
Unescapes HTML entities from freebase responses