Add basic backend feature routers and controllers (also add some static views).
Add working "Attendees list" and "attendee information" pages.
Remove unnecessary "$attendee->id" from "Contact Info"
Add "add attendee" page.
Add "edit attendee" mock up.
Merge branch 'develop' of https://github.com/PhompAng/TBIT58 into feature/backend

Conflicts:
	app/routes.php
Add a working authentication system and some UX improvement
Add ability to edit an attendee informations
Add 'direct_ent' checkbox to edit page
All field are displayed and editable
Datatable integrated
Replace 'attended' with 'updated_at' field
Now working check in by ID, auto insert attending row after registration.
Escape all value filled by user
Fix blank .alert when no session variable assigned
Add ability to delete attendee
Escape all information filled by user before display on attendee list page
Add ability to add an attendee from backend
Fix no text height bug
Replace all button with "toggle" button on check in page