Add symfony commands and extract logic

[hkdobrev]

This is still work in progress, but I'm opening the PR early to gather more input.

I've started this to tackle only #9 at first. But I quickly saw this would not work except I also handle #10.

I think I've explained my changes well enough in the commits.

[lox]

Thoughts on making the classes PSR-2 compliant?

https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md https://github.com/fabpot/PHP-CS-Fixer

Makes it easier for others to contribute. Otherwise, looking good!

[hkdobrev]

@lox

Thoughts on making the classes PSR-2 compliant?

I'd like that as well. But I've wanted for the time being to port the existing code and make it PSR-2 compliant (even with Symfony2 coding standards and naming conventions) later.

What do you prefer?

• Running PHP CS and fixing code style in this PR.

or

• Making all work and then checking if anything else is not PSR-2 compatible in a separate PR.

Added an issue for further discussion: #18

[lox]

These look good, let's just get them into master and work to get everything a bit more object-oriented.

[hkdobrev]

@lox This was not quite ready yet, unfortunately. The regreph command did not work well, because I've removed the directory setting from the benchmarking as I thought it was not needed. But I was wrong. Do you have an idea how to fix it nicely?

I was thinking to abstract the directory thing. So both the benchmarking and the regression testing will receive a working directory, but they will not handle the actual directory creating, git revisions etc.