Added tests and functionality for core module: register, unregister, start, stop functions
deleted test-results.xml
Merging
Deleted wrong core specs
Merge branch 'getting-data' into testfield

Conflicts:
	app/scripts/core/core.coffee
	test/unit/core.spec.coffee
	test/unit/core/core.spec.coffee
	test/unit/core/utils.spec.coffee
Added workflow control functions to Utils module
Added cases for core unit tests and implemented corresponding core functionality
added test cases for error Management. Implementation will change slightly as the project progress
Uncommenting sandbox.spec.coffee tests.Removed log messages from tests.
Merge branch 'testfield' into getting-data
fixed minor errors for test cases to pass.