#26 Catch up with pyqode.core 2.0 branch
Use stop_server in example
Install pyflakes checker mode on python editor
Fix pyFlakes worker
Fix integration test

and update travis.yml (rm un-needed deps)
Add support for frosted, drop support for pyflakes

frosted is a fork of pyflakes which is better maintained and supports
python 3.4. It is also easier to integrate in an IDE, making the
code cleaner
Catch up with pyqode new PEP8 style
Catch up with jedi dev
path may be None
Remove debug messages
Follow pyqode.core renamings
Try a better way to follow definition of imports

to get the correct completion types
Add a way to set sys path when starting the server
Refactor examples a bit
Use prefix to determine if we must follow defs
Preparation for test suite

Use pytest + tox
Rename test folder
Make tox install all deps
Cleanup travis install procedure
Specify tox env