Turned .JVC file into a .JAVA file
Initial commit.
This programme uses the Matrix class and allows the user to
create/manipualte matrices.

I've added the initial options and am now adding the relevant code to
each.
Added all Matrix methods.
For this programme to work properly, it should be compiled using javadecaf
and then compiled again using javac.
Made SWITCH option 4 print the result.
This is the correct JAVA version of the class.