Thrift change, removing optionals from JobSpecT.
Updated Task object to return the value of the task state.
Added a server side until function for checking if a string is null or empty
Converted a could of functions using a query filters to use isValid rather than isSet in thrift.
Removed unused logging.
Updating GUI code to use cython module, some options are slightly different but named better overall.
Merge branch 'master' of github.com:sqlboy/plow