Moves to selectize and adds search form.
Merge branch 'develop' of github.com:briandant/mentor_up into develop

Conflicts:
	mentorup/config/settings.py
	mentorup/config/urls.py
	mentorup/static/css/project.css
	mentorup/static/sass/project.scss
	mentorup/templates/base.html
	mentorup/templates/users/user_detail.html
	mentorup/templates/users/user_form.html
	mentorup/templates/users/user_list.html
	mentorup/users/forms.py
	mentorup/users/models.py