add small style change
fix merge conflict
add helper function for standardizing problem number strings
begin implementing prompts using inquirer
add handler for generate and solve
refactor some helper functions
add comments for api usage
add handlers and prompts for solve and generate commands
remove console logs from generator functions
add handler for preview option
add handler for verify option
add handler for verify-all option
alter the way validate all passes results to the callback
wrap option handler conditionals in a function, add fallback handler for euler with no options
Merge pull request #32 from jrhdoty/master

Add mvp of command line interface