Added check to see if record exists

A lot of things happened here.  I should have commited sooner.

I tried to clean up some of the html, give it proper indentation,
follow div's and fieldbox's etc and note where they ended.

I also added some notations on what the code is supposed to do.
Most of these notes will stay until the project is complete.
Some are places to revist, some are ideas on what to fix.

I also added an IF statement to check if the record exists in
the student table already.  I noticed I was submitting a lot
of duplicates while trouble shooting, so now I am concerned that
I will need a better way to ensure the user_id I return is infact
the one of the user I want.  Maybe it would make sense to give a
message that your student data is submitted?

I am still not sure how I am going to pull off the second table
using user_id as a foreign key.  :\