[fix] Adding DjangoExtensions (useful dev tools) to INSTALLED_APPS
[enh] better viewer (+  now with a toolbar)
Merge branch 'master' of git://github.com/titouanc/beta402
[add] Display time with naturaltime filter
[enh] save pid of deamon when running to close it easily ans add make stop to do it
Merge branch 'master' of https://github.com/C4ptainCrunch/beta402
add polydag.OneParentNode : if a node is a OneParentNode, it raises a CannotHaveManyParents exception if you try to give him to many parents
[enh] Add some variables to Makefile.

Now use `make`
Then `make stop`
[fix] Also ignore helper files created by Makefile
Merge branch 'master' of https://github.com/C4ptainCrunch/beta402