Implement user signup

Signed-off-by: Eugie Limpin <eugiellimpin@gmail.com>
Add SSL in production

Signed-off-by: Eugie Limpin <eugiellimpin@gmail.com>
Add optional size parameter to gravatar_for

Signed-off-by: Eugie Limpin <eugiellimpin@gmail.com>
Test create invalid user error messages display

Signed-off-by: Eugie Limpin <eugiellimpin@gmail.com>
Test success message display when a user is created

Signed-off-by: Eugie Limpin <eugiellimpin@gmail.com>
Use content_tag for cleaner code

Signed-off-by: Eugie Limpin <eugiellimpin@gmail.com>