Framework and tests for unit cancelation.
Merge branch 'devel' into feature/cancelation
Support for cancelation of tasks during Execution.
Fix logic error in legacy code.
Merge branch 'devel' into feature/cancelation

Conflicts:
	src/radical/pilot/agent/radical-pilot-agent-multicore.py
Unit cancelation for the remaining states. Lets see how this goes ...
fix help message / options for radicalpilot-stats
simplify benchmark settings, plotting
Merge branch 'devel' of github.com:radical-cybertools/radical.pilot into devel
make agent a little less chatty...
avoid mongodb document overflow due to slot history
avoid mongodb document overflow due to slot history
script fix
Merge branch 'devel' of github.com:radical-cybertools/radical.pilot into devel
benchmark changes...
add statistics to radicalpilot-stats...
Merge branch 'devel' of github.com:radical-cybertools/radical.pilot into devel
plot layout fixes
plot layout fixes
revert example changes