Introduce driver manager

Count all commited files

Introduce analyzer

Get list of authors with their commits number

Add function to return total number of commits to driver

some changes that I have no clue about

Cleanup

Add Travis-CI status to github

Dirty fix to avoid not empty dir error

Fix issue with directory name

Get git_mock for test suppourt

Define ruby version

Add basic travis CI config

Add suppourt for getting top changed files via git

Add simplecov to the project