Feature/init with options

Adds a `Motion::OCR` class to get a Ruby constructor that accepts an `options` hash. The first option is `:language` which makes it possible to use custom language files. More options to come :wink: 

I bumped the version to `0.1.0`, as I consider the change from `MotionOCR.new` to `Motion::OCR.new` a change above patch-level.