Additional HW1 work. Added to gitignore for HW2
Added HW2 notebook and CalCalc module file.

CalCalc only evaluates with the python eval function currently.
Added try/except to catch if eval() cannot function on the input string.
Added assertion to check for string input
Made eval safer.

Added empty set of global variables to pass to eval and prevented
evaluation with global variables with underscores.
Added float/print return option.
Added Wolfram Alpha connectivity, parsing and value return.

KNOWN BUGS: (1) This only works for simple questions like what is the
mass of XXXX, etc. (2) If you try to return a float from the Wolfram
Alpha reponse you will encounter an error. Need to implement better
string parsing.
Added ignore for .pyc files.
Minor changes: only import StringType needed, added … to print statement
Default float switch set to FALSE

This is better for the script fucntionality because the return of a
function will not print to the command line.
Added script functionality

You can now call the function from the command line.
Added string to print when python evaluates
Added ability for user to force usage of Wolfram Alpha
Added setup.py installation file
Final commit of CalCalc.py
Added readme and gitignore
Merge branch 'master' of https://github.com/jccurtis/homework