Merge missing buffer bug fix from jaynel/history-bug
Handle invalid cxy_ctl table names
Add cxy_ctl common_test suite; refactor init
Verify execute_task and execute_pid; Bump version to 0.9.2

Contributor: Jay Nelson (jaynel)
Branch: timeout

Add common_test functions to verify that execute_task and execute_pid actually
run inline or spawned functions and return the proper values.