CRM-14743 add support for api operators to BAO query object (although at the end will be
over-ruled by various other handlings, however, we are locking in by test

Conflicts:
	CRM/Core/DAO.php
	CRM/Utils/API/HTMLInputCoder.php
	CRM/Utils/System.php
	tests/phpunit/api/v3/ContactTest.php
CRM-14743 add ability to api-range-query modified date

Conflicts:
	api/v3/utils.php
	tests/phpunit/api/v3/ContactTest.php