Parse reek output line by line

[povilasjurcys]

This fix should solve #11 issue. Before we put put all reek output in one object that was passed to linter. Now we split reek output by lines ar parse every line separately

[steelbrain]

Is creating a separate class for output parser really necessary? We also have a parse method in the helper module that parses it line-by-line via a provided regex.

[povilasjurcys]

It looked more OOP until you told me about atom-linter parse method

[steelbrain]

Thanks! Now all we need is someone testing this and confirming that it works.

[dathagerty]

Merged in.