init project
Add TaxRate class and Product class
change test class name to adapt to the class to test
use input message to create product in Product class
change Product constructor to private
have trouble in two double num add
use BigDecimal to fix the bug
Finish output and meet the basic requirements
review code, rename some method
Add readme
Finish readme.md, add some words in the end.
change some place in readme
Merge branch 'master' of github.com:raingxm/SalesTaxes
finish my homework