Merge pull request #1 from gattazr/master

Add curl library
Merge pull request #2 from gattazr/master

Add phpCAS library to the project
Merge pull request #3 from gattazr/master

Modify code igniter to work with PDO
added models for course, question and user question.
updated and tested cody's models for answer and useranswer
Changed the names of the delete and save functions and deleted some comments.
Merge pull request #5 from shiplem3/master

Models for Course, Question, UserQuestion, Answer, UserAnswer
made delete static again. made save not static.
made delete static again. made save not static.
Update answer.php
Update course.php
Update question.php
Update useranswer.php
Update userquestion.php
Merge pull request #4 from gattazr/master

add User, Role, Permission models