New contacts scheme with multiple phones, emails and phone/email migrations
Merge branch 'feature/flexible_contacts'

Conflicts:
	actor.proto
	gen/mps/languages/im.actor.apiLanguage/sandbox/classes_gen/im/actor/apiLanguage/sandbox/ActorApi.json
	gen/mps/languages/im.actor.apiLanguage/source_gen.caches/im/actor/apiLanguage/editor/generated
more semantic Phone fields