Add improvements to workflow

[jendiamond]

SIGNUP/SIGNIN:


• Members Table
 (Devise)
 

• Removed "Username"
  • which was not being used by anything (auth didn't need it, and was not used anywhere else)
 

• 
Once SIGNED IN
  • the "Apply" button should take you to Apply form (only if not applied previously, but we need to that).

  • in the navbar, this correct, takes you to: /users/new

• the button on form, also takes you to /user/new if signed in,
• OR, when not signed in, takes you to Sign Up.