CNH, NFe Access Key and Voter documents

Change Log

v0.2.0 (2016-08-25)

Full Changelog

Implemented enhancements:

• all classes are declared final #15 (tonicospinelli)
• add Voter document #12 (tonicospinelli)
• add NFe Access Key document #11 (tonicospinelli)
• remove Modulo11 class in favor DigitCalculator #10 (tonicospinelli)
• add CNH document #7 (tonicospinelli)
• rename InvalidArgument to InvalidDocument #5 (tonicospinelli)