Updated Util.isInteger to support commas, validator.term, the same
Moved some Validator methods to Util, finished Term?
Commas now automaticly removed from numbers, Util.isInteger nolonger
supports commas
Worked a lot on the solver. Time would fail me to tell all.

Telling you everything is github's job. :)
Worked on misc TODO in preparation for work on solver

Added a methods, moved some to Util, etc.
Yesterday's work on Solver

Updates how equations are stored in some classes (Equation instead of
String)
Misc method changes to structural classes, addition/deprication/removal 

Structural classes structure the solving process and include Equatoiin
Expression Term and Step