Merge branch 'refs/heads/master' into develop
Working on code completion
Update CC variable icon ( + recompile ui)
Working on cc
CC bug fix: on windows space was inserted when doing ctrl+space
Cleanup + fix bug when inserting a completion  with a no word under cursor
Closes #11 (calltips)
Cleaning imports
Added a function to retrieve get a QTextCursor from a line and colum number
Added PEP8 checker (still needs to provide a message when the mouse hover the decoration)

Enhance calltips performances
Added new icons for code completion (thanks to Céline Thiry)
Fix setup.py
pep8
Improved QThread usage
Make the editor a weakref and add a property to easily/transparently retrieve the real reference
Improved code completion (now all the hard work is done in a background thread)
pep8
Added white style based on tango palette
Make current line nbr italic
Added a try/except block when jedi fail to generate a call object