Merge pull request #11 from Mauraders/user_profile

User profile
added css to login, sign up page, removed sign up view from user_profile/views.py, created base template header.html with navbar only, changed login and sign up page html to inherit from header.html, removed profile pic and phone number from sign up form
Merge pull request #12 from Mauraders/user_profile_css

added css to login, sign up page, removed sign up view from user_profile...
changed input type of username from email to text