-ClassInfo: done

-Main:
1) I implemented Main method in Main class to test if everything works
well.
2) I created a hashtable of packages in Main class and recalled it in
ClassInfo to add a class to a package.

-PackCouplingParser:
I modified PackCouplingParser by putting a block around the first
parameter(Package List) since we cannot get a list of packages unless
jdepend runs and analyzes a file. This modification is just for my
testing ClassInfo class. (I might have not understood this class
correctly.)