Implement a ugly way to make the child wait at shutdown (so that the pipes are fully drained).

Change the sleep to 0.5

Sleep 1 sec and don't raise exception if killing already dead process.

Cosmetics
Bumps version to 3.3.0.9
Windows/Python 3.3: Fallback for missing _winapi.WAIT_ABANDONED_0. PipeConnection handles can now be inherited by forked processes.
Updates CHANGES.txt
Bumps version to 3.3.0.10
Merge branch 'master' into 3.3