Minor enhancements/corrections to several Services
- Ordered the hosts/service array alphabetically in the Providers class.
- Added docblock-link (with documentation when available) to
  most service providers
- Service maintenance:
  - Animoto: Use html5 embed code and removed advertising from embed code.
  - AolOn: Cleaned a little the html response, added offline support.
  - Bambuser: code cleanup and offline support added.
  - Cacoo: code cleanup and offline support added.
  - CircuitLab: code cleanup and offline support added.
  - Chirbit: code cleanup and offline support added.
  - CollegeHumor: Removed spam from html embed code, added offline support.
  - Coub: Added offline support.
  - CrowdRanking: Added offline support and support for c9ng.com urls