Point summary enhancements

Now the point summary section on the dashboard shows only the points
from classes when loaded and classes can be expanded so show the
different categories.
Moved Dashboard code

Moved the dashboard code to another file. This get's rid of the problem
of "resending" login form info on refresh. Also, I can better handle the
$_SESSION variables.
Created 'Add Class' functionality

Users can now add a class. Later there will need to be improvements to
error detection and handling.
Merge pull request #12 from reedjasonf/Add-Class

Add class fixes #6