Added Validation in Register

Checks if:
-no empty fields
-password matches
-unique email
-password length minimum of 6
Code revisions, Framework update, Database revisions
Fixed main features not working
Fix main features
Merge remote-tracking branch 'origin/Back-End' into Back-End

Conflicts:
	app/controllers/HomeController.php
	app/controllers/NoteController.php
Fixed Tags not working
Merged with master
ADDED DATABASE UPDATE INSTRUCTIONS
Fixed Miscellaneous Tag not working