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Add basic ruby formatting for stack frames

Gives a more ruby feel to the stack traces.
Merge pull request #981 from eric/patch-1

Add basic ruby formatting for stack frames
Add .seen styles
Reverse index for optimized query patterns on GroupSeen
add hasSeen to api responses
Add seen and improve bookmarked (UI)
6.2.0
Move group tests and test GroupSeen recording
Improve mail and env pages
Add a context line to the ruby frame
Merge pull request #982 from eric/patch-2

Add a context line to the ruby frame
Dont record GroupSeen when access is based on superuser
Record user-less IPs as unique users
Handle missing user_data
Add User.ip_address
Add IP support to user rendering
Automatically set User.ip_address from client-side events if not present
Handle dict-like querystrings
Don't limit the number of projects returned