added student list view and filter functionality added
functionality related to teachers list and filtering added.
pagination added in both students and teachers.
export functionality added to teachers and students
side menu links updated.
removed redundant auth filter
updated font size
Merge remote-tracking branch 'origin/hitanshu' into naveen

Conflicts:
	trunk/application/controllers/student.php
added jquery uploader api
added sample markup for upload functionality
added init function for uploader functionality
added empty upload.js for corresponding view