Circle-of-Hackers/basic_calc — pull request #1 by pwalton (2014-01-08 04:57:58+00:00)
Title: Basic calc.multiplication

-Implemented the multiplication feature.
-To reduce repetitive use of code, refactored some shared code into a calculator object.

Not devoted to these, but they seemed right:
-Did some refactoring to the eval method to reduce need to rely on variables tracking if statements
-'eval' is a Javascript global function, so I changed the name to 'evaluate'