Add new query flags to partioImport command (-listAttributes\-la and -attributeType/-at [multi])
Use object list rather than command argument in partioImport and partioExport commands for a better arg parser behaviour
Fix compile error with maya 2011 (no MCacheFormatDescription class in API)
=> partioCache won't work yet with maya 2011 and below. Probably need to create a cache XML file for maya to recognize particle channels