Created Core module. Implemented pub/sub service.
core changed, core specs added, travis config added
added tests for app.mediator module. installTo method added to app.mediator
Merge branch 'testfield' of https://github.com/SOCRedu/SOCR-framework into testfield

Conflicts:
	app/scripts/mediator.coffee
#SOCR-49 Fixed
core module
core spec updated
Merge branch 'testfield' of https://github.com/SOCRedu/SOCR-framework into testfield

Conflicts:
	app/scripts/core/core.coffee
small fixes in sandbox and sandbox-specs
plugin functionality and test added to core and core specs
version and style fixed in services
removed installTo from mediator. Created errorMngr module
added utils module and utils specs
removed empty line after .factory because of linter eror
mediator syntax error fixed
.gitignore updated
removing _public/ folder
communication between view-controllers added
started getData module.
adding ui-router and angular-ui add-on packages.