Refactor the MemoryStorage class and specs
Formatting, add contributing and license sections
Leave only one license file
Merge pull request #3 from TTPS-ruby/license

Leave only one license file
Merge pull request #2 from TTPS-ruby/readme

Formatting, add contributing and license sections
Merge pull request #1 from TTPS-ruby/refactoring

Refactor the MemoryStorage class and specs
Delegated each to values