ipython support

added ipython to zc.buildout
Pinned distribute to 0.6.49 and virtualenv to 1.9.1
Merge pull request #82 from ibeex/master

ipython support
Placed items in an alphabetical order
Don't install own PyYAML anymore. PyYAML version upped to 3.10
Merge branch 'master' into patterns-delivery
Made API names match the docs