Initial commit
adds readme with dirver code
Merge pull request #1 from LyndseyWilliams/readme_setup

adds readme with driver code
fixes quotes in driver code
adds rpn calculator
Merge pull request #2 from LyndseyWilliams/rpn_calc

adds rpn calculator
adds string to num conversion, WIP
removes extra line
Merge pull request #3 from LyndseyWilliams/string_to_num

String to num
adds ARGV and reverts back to using Integer
Merge pull request #4 from LyndseyWilliams/string_to_num

adds ARGV and reverts back to using Integer
verifies length of argv input
handles exceptions for letters, strings that are too short and strings missing operators
Merge pull request #5 from LyndseyWilliams/exceptions

Exceptions
adds parser for string input
add to read_me
add to read_me
adds notes
adds readme