-Added GitCurrentBranchCommand
-Added CocaineCommandRunner
-Moved Command children to ierarhy
-Added activesupport dependency
-Fixed specs for ScenarioRunner and Cli
-Fixed running logic
-Mostly completed Cli class
-Added Config class
-Refactor Config class spec
-Instantiate command runner by setted in config
-Added FakeCommandRunner
Finish commands_realization