Changed obsnums to be integers, made unittests pass again.
Synced task_server_test.py with recent chagnes to task_server.py.  All tests pass.
Changed Action.has_prerequisites() to take no arguments.  scheduler_test.py edited and passes all tests.
Introduced abbreviated file processing for end files in ddr_compress.  Completed end-to-end test of scheduler and task server and scripts.  All tests pass.
Translated 'filename' to 'obs' in scheduler.py.  All tests still pass.
Added (untested) kill functionality to task_server.Scheduler.
Comment tweak in scheduler.py
Copied in some of the relevant underlying scripts for ddr_compress.
Made Task check if process is None before polling to avoid an Exception when a task is polled before it is run.
Added new comment in scheduler.py
Merge branch 'master' of github.com:dannyjacobs/capo
Minor change to TaskHandler.
Merge branch 'master' of github.com:dannyjacobs/capo
db and scheduler are integrated. passes all tests