allOf cleanup
- Improved Required support
- better required formatting
- Fixed attribute extraction on nested objects
- Comm now follows iOS/Android push/gcm formats
Fixes for validator
Rendering a link->schema that was a $ref was broken.  A quick hack to fix it.
Merge branch 'master' of github.com:zshapiro/prmd
Merge branch 'hacky-fix-for-referenced-schema'