Re-work the TShark finder
Merge pull request #20 from bbayles/reconfigure

Re-work the TShark finder
Made stoppable thread used in sniffs backwards compatible with python 2.6
Handling tshark crashes more gracefully. Note that on windows it might take too long for the tshark process to actually die so the exception may still not be raised.
Add some tests of FileCapture
Close file objects
Add test capture
Test with setup.py