reduced the I/O worker thread multiplier to 1 as default in ning AHC
got rid of fake 'bash' operator. corrected behavior of python operator. revamped scriptoperator base class
Merge branch '0.9-migration' of https://github.com/DataTorrent/Malhar into 0.9-migration
got rid of fake 'bash' operator. corrected behavior of python operator. revamped scriptoperator base class

got rid of keep context
Merge branch '0.9-migration' of https://github.com/davidyan-malhar/Malhar into 0.9-migration

Conflicts:
	demos/src/main/java/com/datatorrent/demos/pi/ApplicationWithScript.java
Merge branch '0.9-migration' of https://github.com/DataTorrent/Malhar into 0.9-migration
made alert escalation auto record on whole operator as opposed to individual output ports
Merge pull request #225 from davidyan-malhar/0.9-migration

0.9 migration