Merge pull request #9 from aaromp/master

update problem.txt and file io
make option selection more robust, add support for coffeescript
Merge pull request #10 from jrhdoty/master

make option selection more robust, add support for coffeescript
add dependency on inquirer for command line prompt
Merge pull request #11 from jrhdoty/master

add dependency on inquirer for command line prompt
add validator