Working only with thread primitives.
Merged with master.
Improving test_debugger.
Minor
Fixed issue where breakpoint would not be hit.
Merge branch 'development' into invisible_threads
Minor.
Removing some dependencies from the threading module.
Allocating locks from the thread and not threading module.
Added back import.
Not using threading on some additional cases.
Minor
Adding other platforms to be tested.
Change in travis.
Improved operation with gevent / debugger stopped atexit.
Travis.
Improved teardown of process / checking things are running on Jython/IronPython.
Fixed test on py3.
Minors
Printing on debugger startup is now an option (default false).