Remove previous value label

Remove call to query user dictionary for previous value display. Also remove preVal UILabel reference and commented out all UI code to prepare the prevail label.
Add appledoc functionality

Added build target "Documentation" which can be run to generate appledoc documentation based on comments in code. This is viewable as HTML documentation.
Add Documentation scheme
Add documentation to PCAMainViewController

Add appledoc comments and successfully compiled documentation.
Finish adding documentation. appledoc looks good
Remove Parse framework from folder

Delete Parse framework. This will avoid overhead on the appledoc documentation and simplify the source folder.
Also remove link binary in Targets so Xcode is no longer looking for Parse.