Add make sdist
run all test and update to pypi
Add make clean
remove all pyc
create git tips page, add topic Forking opps
Add toctree on develop, join git-tips
Add topic Making your changes (git tips) on docs
Add topic Issuing a pull request (Git tips) on docs
Add topic Squashing commits (git tips) on docs
add topic Relevant Resources (Git tips) on docs
Fix toctree on docs
Merge branch 'master' of github.com:opps/opps