Fix for #525
For replies it populates the annotation.quote field with the parent's reply.
The userstream.coffee page will use this field if exists.
Fix for #524
 userstream page does not display text for highlights but shows as much as it can from the quote
Fix #524
The detail view of the user stream is nice to highlight-only annotations
Userstream bugfixes and improvements:
- Added link to standalone page for each annotation in userstream
- Handling update/delete well
- Fixed search_raw to pack annotation.id to the answer
Bugfix for past_data query, instead of limit, the size property has to be used
Minor: PEP8 style
More PEP8 comment style
using unshift(<>) instead of splice(0,0,<>)
Removed first_connection checking, relying on caching
Styling comments
Merge pull request #591 from hypothesis/user-stream-improvements-4

Stream improvements 4