Add 'boostrap' management command

Scans through INSTALLED_APPS for a module bootstrap with a function
bootstrap, which will be executed. Useful to quickly get started
developing since you have a starting environment.
Make Event.binding_registration default to false
Add bootstrap module for events
Add bootstrap module for articles
Add bootstrap module for quotes
Add bootstrap module for musikk
Add bootstrap instructions to readme
Merge pull request #36 from thusoy/bootstrapped

Add bootstrap command