Create a "Contributing"/"Hacking" document

[gicmo]

Maybe it would be good to have a little document where we 'codify' the style of coding within the project, like other projects do: [1],[2],[3]. It doesn't have to be that exhaustive but basic indention style, git commit messages, method naming, etc. pp. would be good. It would surely also help for people new to the project.

[1] http://clang.llvm.org/hacking.html
[2] http://developer.gimp.org/HACKING
[3] https://git.gnome.org/browse/gvfs/tree/README.commits

[balint42]

started as wiki:
https://github.com/G-Node/pandora/wiki/Hacking

[gicmo]

@balint42 @jgrewe also started already. See the Contributing.md file in the repo. Could you merge the two?

[balint42]

done

[jgrewe]

I guess this has been dealt with quite some time ago...