v0.15.0
Speed up importing of past.translation (issue #117)
Remove import of dummy_thread from _thread module (issue #124)
Bump version to v0.15.0
Make imports of http.client constants compatible with Py2.6 (issue #137)
Enable conservative basestring fixer from past.builtins (issues #127 and #156)
Also add ttk support to future.moves
Small doc updates
Make the src folder a package (for the same of importing src.future.__version__ etc. from setup.py)