Ensures force_clean doesn't run for pycc tests

There are tests that inherit from PyonTestCase but are part of the INT group of
integration tests. The PyonTestCase adds a file system cleanup at the
conclusion of the test runs. This patch does a quick env variable check to make
sure that a file system clean is allowed.
Merge pull request #507 from lukecampbell/fs

Ensures force_clean doesn't run for pycc tests
publish resource agent lifecycle events ("agent started", "agent stopped")
Merge pull request #508 from carueda/agent_lifecycle_events

publish resource agent lifecycle events ("agent started", "agent stopped.")
accepts km in WKT buffer
New container prompt
Removed unused top level files
Polished README and setup.py
Removed ionprint
Revised pyon.public
Polished object constants
had km, need m(eters)
cast bask to geometry needed for comparison
Merge pull request #511 from brianmckenna/m112_add_km_radius

CIDEVSTC-99 - M112 - support search radius in meters
Merge pull request #510 from mmeisinger/add_polish

Cleanup and polish pyon repository
Added datastore query constants
CIDEVSTC-306: Enhancements to resource and association queries
CIDEVSTC-306: Enhance event queries
CIDEVSTC-306: Provide recursive resource and association queries
CIDEVSTC-306: Provide parameterized datastore queries