Revert "Converted all date/time handling and tests to use UTC"

This reverts commit f828b5384e20db7d56da477cfa20c6a979c0cd13.

Conflicts:
	api.htm
	lib/compressed/picker.date.js
	lib/compressed/picker.js
	lib/compressed/picker.time.js
	lib/picker.date.js
Added test that uses local time to ensure that the date value is correct for the users timezone. For example 'Wed Jul 23 2014 00:00:00 GMT+0100 (BST)' should be interpretted as 23 July, 2014'. Added .idea to gitignore for JetBrains IDEs.
Added close button to picker. Resolved jshint errors which already existed in the code base through unused variables/functions in demo.js