Added friends/ids, friends/list, application/rate_limit_status

Added api endpoint for friends/ids.
Added test case for friends/ids.
Added api endpoint for friends/list.
Added test case for friends/list.
Added api endpoint for application/rate_limit_status
Added test case for application/rate_limit_status
Added test case for users/lookup
Merge branch 'master' of https://github.com/nickklosterman/node-twitter

Conflicts:
	tests/RestClientTestCase.js
	tests/UnitTestMain.js