Merge pull request #1 from contolini/master

Accept options object
throw loan term error
update error tests
update README for options object
use public domain license
add contributing, copying, and terms
add more test values
add installation instructions
allow currency formatted numbers to be passed as a loan amount
add additional test
comments
error comment
correct return values and add currency formatting
fix comment typo
string quotes
point to cfpb repo
update travis build status graphic
Merge pull request #2 from ascott1/master

update travis build status graphic
CFPB as author
Corrected minor spelling error