Merge pull request #37 from mikhkonkov/master

change credit card validator, parse solution and test helper
Change README
Remove old asserts from README and add test for one solution
Merge pull request #38 from OlegSilakov/master

Change README
Change code blocks in README file to markdown style
Merge pull request #39 from OlegSilakov/master

Change code blocks in README file to markdown style
Add asserts for checks in README
Merge pull request #40 from OlegSilakov/master

Add asserts for checks in README
integration with multicode
add issues
Merge pull request #41 from MrPhantomT/master

add issues
add issues
Merge pull request #42 from MrPhantomT/master

remove folder doc