(2ND LATEST) Login and signup form.
--MapController/polyhome, temporarily, is used after successful signin
--signup, with usertype. ISSUE: (1) Might need email field for verification.
--login, added new file 'application\view\login.php, a solo page for login wherein user will be redirected with errors when tried to logged in sa header login. ISSUE: (1) No need for incident filters.

P.S. Kindly look after sa redirections..