Added public function to set user data from client
Added email to userdata, removed unused is_authenticated
Do not clobber extra info when passed to capture method in data array
Adding Test passing extras to capture message
Merge pull request #87 from skeetio/master

Extra data being clobbered
Performance improvement on hash hmac, passing strlen to out of loop
Merge pull request #80 from practo/master

Added public method to set user data
Merge pull request #88 from entering/performance-improve-hash-hmac-strlen

Performance improvement on hash hmac, passing strlen to out of loop
Ability to filter shutdown errors like normal errors
Add tags to exceptions