* safe: true for all ensureIndex calls etc.
* Many fixes to singletons. They no longer render a broken widget before they are populated. There is an empty normal view div so we have something to pop a new widget into
* Cleaned up diverging implementations of slugify, apos.slugify is to be used everywhere, there is a browser side version as well
* apos.isUniqueError tells you if a MongoDB error relates to the uniqueness of a field so you can retry
Merge branch 'master' of github.com:punkave/apostrophe