Use catchsegv for Travis

This should make it easier to find out what's happening on segfaults.

Author: The-Compiler

.travis.yml

@@ -40,7 +40,7 @@ before_script:
 
 script:
  - python setup.py develop
- - coverage run --source=pytestqt setup.py test
+ - catchsegv coverage run --source=pytestqt setup.py test
 
 after_success:
  - coveralls