Added the modify charge option w/ some html fixes

On the admin homepage, I added a button that is called "modify charge".
What this takes us to is a new jsp page called modify_charge that takes
in an amount and lets you select from the list of students. I haven't
gotten it to add or subtract from the overall charge. Also, I want to
have a list of courses as well as students so we know what course the
charge is being fixed for, but I could not figure it out. I am going to
label this task as done for now, but it needs just a little tweaking. I
also edited the SCD entity class to have a mutator method called
addCharge(int amount). What I was hoping to do with this is take in the
amount typed in by the user, negative or positive, and add it to that
specifc student's overall data. I still haven't finished the
ModifyChargeServlet, but currently it takes in the amount and the
student, but that is it. Like I said, it needs a little more
functionality and it should work.

I also edited out all the admin's page titles that said "Dog Walking
101". I don't know if this was necessary, but what I did was just
labeled them all admin pages with the certain type of page it is. Have
a look! Feel free to fix anything that you guys don't like
changed a couple things
Merge branch 'master' of https://github.com/YOLOcs361/Project

I don't quite know what is going on here
more commits that never got synced
Merge branch 'master' of https://github.com/YOLOcs361/Project

Conflicts:
	war/WEB-INF/appengine-generated/datastore-indexes-auto.xml
	war/WEB-INF/web.xml