Added gridNodes.js data model. Began trying to implement the nodes into creep movement. got stuck.
Forgot to actually add gridNodes.js
Merge https://github.com/bmceldowney/crossroads

Conflicts:
	js/creep.js
	js/gridNodes.js
why did git get activated in Visual studio?
Fixed creep walk animations. Cleaned up some stuff.
the movement is divided into 2 steps & tweens.
2 Step movement now working with world wrap! Looks good!
Creeps now walk with more purpose! Looks like they are getting somewhere!
Fixed a bug for firefox in creep.update(). Creeps are now 1/16 less purposefull on their walks.
adding npm install for unit tests
Merge branch 'master' of github.com:bmceldowney/crossroads