[1] update database script, connect to db [2] minor files comments updates
[1] fixing bugs
Revert "update"

This reverts commit 370dd1b8146999c3b50a012e2cbfaba22f15e501.

Conflicts:
	application/config/database.php
	application/controllers/main.php
	application/views/forms/login.php
	application/views/forms/sign_up.php
[1] database set up. [2] connecting wtih db [3] folder restructor
[1] create unit testing environment [2] establish testing cases
create sign up validation, entity search. [2] login in created and basic validation