Adding full range of Helper API Calls

_js/twitterAPI.js => API Calls
_js/example_twitterAPICalls.js => How to use the API Calls
twittertutorial => invokes the example_twitterAPICalls.js
Merge branch 'master' into IOLab_PJ2

Conflicts:
	_js/example_twitterAPICall.js
	_js/twitterAPI.js