Using clang-format for formatting our code

[Hugo Melder]

Hi,

Having a consistent code style is useful both for reading and writing code, 
especially for contributors. The GNUstep base framework currently has a 
.clang-format configuration file in the project root, but is not used. We could 
use a configuration file from major Objective-C open source projects like 
WebKit, or define our own formatting guidelines.

What is your opinion towards strict code formatting?

Best Regards

Hugo