create upload task
added upload task related methods and event handling
rebalance workers
reduce logging
fixed some fat fingers...
create post meta strategy, decoupling upload pipeline
create new file method re-arranged, added filesize check
added file related errorcodes
refactor variable name
refactor variable name
added normalize filepath check, added method to retrieve file info by id
fixed folderpath normalization issue, added method to query file info by id
post file strategy does not deal with creation of meta data anymore, just with file chunking
upload task, raises event after completed meta post