removed link and snippet plugin
typo in requirements
Merge branch 'develop' into link-remove
tests passing but not working yet
Merge branch 'develop' into link-remove
lazy choicefield
upated requirements
updated requirements
removed new migrations
updated docs
doc updates
doc fix
empty choices
Merge branch 'digi604-link-remove' into feature/remove-plugins

Conflicts:
	cms/plugins/teaser/migrations/0002_publisher2.py
	cms/plugins/video/migrations/0002_color_mute_controller.py
	cms/plugins/video/migrations/0003_newplayer_step1.py
	cms/plugins/video/migrations/0004_newplayer_step2.py
	cms/plugins/video/migrations/0005_newplayer_step3.py
	cms/plugins/video/migrations/0006_newplayer_step4.py
	cms/plugins/video/migrations/0007_newplayer_step5.py
	cms/test_utils/cli.py
	cms/tests/plugins.py
	test_requirements/requirements_base.txt