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
refactoring work, adding client node classes
Adding remaining JS Node classes
Refactoring runtime tree
Plots working and simulation getting updated, needs to fix issues in
solver and simulator updates.
fix for slow update processing
Implement getmodeltree command
Adding vaiablenode class, ending of refactoring for fixing errors, and
adding qunit tests
fixing glitches and improving comments on code
Place console above widgets
Support for OBJ models
Renaming objects to make it clearer what they do. Renames NodeFactory
class that creates client nodes , to runtimetreefactory. Code that did
update to widgets was moved inside here to optimize perfomance.