Bumped pyon
Merge pull request #901 from shenrie/master

Bumped pyon
Merge pull request #900 from carueda/platform_fix_leaks_r2_full

should fix leaked processes in platform tests on buildbots
aggregation status now handled using a "push" approach: all calculations and subsequent publication of derived events are triggered by events received from children agents.
Using new supporting class StatusUtil. Specific aparams handled are aparam_child_agg_status and aparam_aggstatus.  test_platform_status exercises this updates with various transitions.
merge upstream/master