Only flush inputs/outputs if they have been changed.
Cleanups to input/output data flushing.
Added jobSetup to the plugin events.
make the io methods properties.
Fixes for setup plugin tests.
Fixes getData issue on layer.
Added layer support to archive getData
Fixed IO format bug
Added getData default arg support.
Support the "nodes" arg for nuke.
New IO handling system.
set services properly for maya and nuke.
A refactor to simplify Layers/Tasks. The layer is still the base class (for now), with a few different subclasses.  Task, TaskIterator, SetupTask, and eventually PostTask.
Better handling of post task launches.
Add PostTask to exported entries.
fix TaskIterator import statement
fix maya module TaskIterator import
Merge branch 'master' of https://github.com/sqlboy/blueprint
typo args --> kwargs
fix logging handlers to create default WARN at module level