perfecto perfecto

.quiz result widget has been hid
.facebook recommendation widget has been disabled
.Back/Next buttons on course_playback fixed
.Buq fixed at register_21, register:85
.Full name is showing in profile & widgets
.Hid suggest me a track [tracks:3] & quiz realtime result
.home
-Course title linked to course-intro screen
-Resume button linked to course_playback screen
-My Tracks, My Courses show up nicely
.library
-Course title linked to course-intro screen

- TABLES UPDATED: users(first_name,last_name added)

- MODELS UPDATED: user(active set to Yes),(first_name,last_name added),
tracks_enrollment, course_enrollment

- CONTR. UPDATED: register & a lot more

- SCREENS UPDATED: course_playback, library, home, tracks, leaderboard
perfecto perfecto perfecto

description in last commit
Merge remote-tracking branch 'origin/master'

Conflicts:
	application/views/pages/library.php
	application/views/widgets/category-leaders.php
	application/views/widgets/top-three-students.php
Merge branch 'master' of https://github.com/theunusualsuspect/vit