fix some mistakes & typos in README.md
Merge pull request #47 from vyorkin/fix_readme

fix some mistakes & typos in README.md
Update issue.example.yml
add some more asserts for build_key_value

fix tests & issue
Added power-digits-sum-test + generated issue
Merge pull request #48 from vyorkin/build_key_value

add some more asserts for build_key_value
Merge pull request #46 from Makapoxa/power-digits-sum

Added power-digits-sum-test
Added fibo issue + test, minor code refactoring
Merge pull request #50 from Makapoxa/fibo-finder

Added fibonacci test + generated issue
Added twenty-one
Merge pull request #51 from aelaa/twenty-one

Added twenty-one