studentCharges.jsp creation

- Created a studentCharges.jsp
- Tried figuring out doPost for StudentCharges Servlet, but I think I
need help understanding it.
- Created a constructor for Charges that only takes an amount for
testing purposes.
- Was having some issues with<c:blah> tags not working quite right, so
tried adding a jstl .jar
- studentCharges.jsp gives the same output as StudentCharges servlet,
but submit still doesn't work.