Fix event loop closing
Fix test
Fix test
Make tests finish earlier
Merge pull request #10 from aknuds1/linux

Linux
Disable QSocketNotifier while calling read/write callbacks
Fix tests
Ignore futures that are already done
Add tests
Improve tests
Handle problem of remove_reader being called too many times
Cache dependencies on Travis for faster builds
During tests, stop event loop in case of uncaught exception
Handle self._ssock being None
Fix travis caching
Debugging