Add support for phing build

Maybe it would also be good to add support for phing build.xml file?

[raphaelstolt]

For large projects it totally would make sense, but I guess this projects primarly focus are small packages. The other question is if Phing is still this popular like it used to be, nowadays I would prolly prefer Robo or Makefiles.

So a possible addition (i.e. --with-build-system) should not be limited to a specific tool which will be hard(er) to achieve.

Hi @raphaelstolt,
that's doable, for me

[raphaelstolt]

@jonathantorres What's your standing on this?

[jonathantorres]

I'm up for it, as long as it's something optional (like the CLI option etc.) and provide different options (phing, robo etc.)

[raphaelstolt]

Hi @piotr-zuralski still intend to contribute this?