Account Creation Error

[mpuglin]

When attempting to create an account, you are presented with a HTTP 500 Error if using an email account which is already associated with a login. OSSIndex should simply present a notice to user that the email is already in use.

[mpuglin]

Best practices suggest that if someone tries to login and they already have an account, we tell them this is the case and send them to the sign in page instead of throwing an error.