warn against sorting requirements

Change-Id: I64ae9191863564e278a35d42ec9cd743a233028e
Addresses-Bug: #1365061
Work toward Python 3.4 support and testing

Change-Id: I6119bb1420d6eb318215a656424f01cca6a3146c
Build universal wheels

Build wheels that can be installed under python 2 and 3.

Fixes-Bug: #1363243
Change-Id: Ica67cc894f4c8622b0a5849aa8d62fb1d5009fc4
Merge "Work toward Python 3.4 support and testing"
Merge "warn against sorting requirements"
Update repository location in docs

After the move from stackforge the git repository location
in the documentation was no longer up to date.

Change-Id: I7ccb0abe188f4cdebd36b727f6a681aba370af0f