Bug 967272 - Introducing contact photo thumbnails for new contacts,

and using thumbnails wherever it makes sense.
r=arcturus, jmcf(facebook), julienw(sms), rik(dialer)

(cherry picked from commit 407761e5ec53387b55fa755888c88915d081120d)

Conflicts:
	apps/communications/contacts/test/unit/views/form_test.js
	apps/communications/dialer/test/unit/call_log_test.js
	apps/sms/test/unit/sms_test.js
	apps/sms/test/unit/thread_list_ui_test.js
	apps/sms/test/unit/thread_ui_test.js