Restructured Exercise Goal page

Added update panels to the page so it has a nicer refresh
Added the view exercise user control
Merge branch 'master' of github.com:Lynart/Project-LimitBreaker into issue112
Added add new exercise goal form

Added all the fields necessary to add a new exercise goal
Added the function to save the new exercise goal to the database
Save button functionality works
Currently missing validation and error checking (can add a goal to an
exercise with one already)
Finished add exercise goal

Added a function that is used to disable the save button if there
already is a goal for that exercise
Added validation to the page
fixed a small bug
Made vince's suggestions
Merge pull request #143 from andeic/issue112

Finished add exercise goals