Checkpoint feedback#5

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vonvick wants to merge 6 commits intodevelopfrom

checkpoint-feedback

Commits on Jan 19, 2017

refactor(string): refactor string class based on feedback
victor nwaiwu
committed
refactor(test): refactor test files to pass after refactoring code
victor nwaiwu
committed
style: fix trailing spaces issue with houndci
victor nwaiwu
committed
refactor: throw error when the input is not a number for the toCurrency method
victor nwaiwu
committed
refactor: refactor front end to display error
victor nwaiwu
committed
style: fix import/no unresolved module issues with hound
victor nwaiwu
committed