[mod:custom.css] Add style for map canvas

Add css style rule for map canvas div used in track_student view.
[add:defaultMapLayout.ctp] Add new layout to the project

Add a new layout used in views where maps are diaplayed. Contains
scripts needed for Google Maps to work.
[add:mapHelper.js] Add javascript file - mapHelper

Add mapHelper.js file to the project that contains the script
for google maps. And contain the sample data for push pins.
[add:track_student.ctp] Add student tracking view to the project

Add track_student.ctp that includes the view for tracking students
for admins and lecturers.