Add clang-format

Ref: #10

README.md

@@ -7,6 +7,9 @@ A list of actually decent, actually used AND appreciated in the industry C++ lib
 ## Testing
 * [Catch](https://github.com/philsquared/Catch) - A modern, C++-native, header-only, framework for unit-tests, TDD and BDD.
 
+## Tools
+* [`clang-format`](http://clang.llvm.org/docs/ClangFormat.html) - Highly integratable C/C++/Java/JavaScript/Objective-C/Protobuf code formatter from the Clang team.
+
 ## Compilers
 * [GNU GCC](https://gcc.gnu.org) - Part of the GNU Compiler Collection, and for many the reference in terms of C++ implementations.
 * [Clang](http://clang.llvm.org/) - A modern, modular C++ compiler, often the first to implement new C++ features. Bundled with [Xcode](https://developer.apple.com/xcode/) for Mac OS users.