Merge pull request #109 from openworm/master

Bring back to development
added G.resetCamera() and 'home' buttons are now executing it via
console
mapped rotate and pan to G global obj api
mapped zoom to G global object
Refactor message handlers to use command hash instead of switch statements
Merge pull request #111 from mlolson/message-handling

Refactor message handlers to use command hash instead of switch statemen...
refactored hooks for camera buttons so that they don't get added every
time a simulation is loaded
return strings from camera methods on G
Merge pull request #112 from openworm/wrap_camera_buttons_api

Wrap camera buttons api
Release 0.1.5
Merge pull request #113 from openworm/development

Development