add binding for location_in_view json wire call
More robust sessionID parsing. 

Now handles sessionID's that are returned with a trailing slash.
Merge pull request #160 from buzzfeed/location_in_view

add binding for location_in_view json wire call
Merge pull request #161 from kerryck/session-id-parse

More robust sessionID parsing.
Merge remote-tracking branch 'origin/master' into location-in-view

* origin/master:
  More robust sessionID parsing.
  add binding for location_in_view json wire call
Remove duplicate getLocationInView