Add theme option with a0-theme-default as default theme. Enables theme-less lock by setting to false
Move zocial.less as part of the theme default
Fix chaining of CSS for theme default
handle `requires_username` in db connection
sign-up tests with `requires_username`
Update package.json with latest auth0-js release
Move _isUsernameRequired to options-manager lib module
Remove forgotten debugger
Update input borders for new setup of username+email and any combination
Update to parse and mark username exists error when creating with requires_username database
Fix styles for input borders
Fix placeholder for username when requires_username enabled
Fix tests
Fix tests for requires_username
Fix appearace of icons for email/username/password inputs in different modes
Update tests for requires_username mode for database connection
Improve gravatar tests speed
Merge branch 'add/theme-option'

Conflicts:
	lib/css/main.css
	lib/css/main.min.css
Merge branch 'add/handle_require_username'

Conflicts:
	lib/css/main.css
	lib/css/main.min.css