adding term completed

Academic year and term is removed classes_and_lessons_tcl_by_id since it is needless. (To fix a notice error in module of room_booking)

hook_username_alter()is added to show formatted full names every where.

student, staff, parent registration forms are using Drupal's native user register form. It makes school admisnistration module better to work with profile2 module.

some make up issues

protection of same photo insertion to db is added. (by using md5)