Add clang-format as a fixer for Java/JavaScript/Objective-C/Protobuf code

**Name:** clang-format
**URL:** http://clang.llvm.org/docs/ClangFormat.html

As per the clang-format website (see above), clang-format works on C/C++/Java/JavaScript/Objective-C/Protobuf. Particularly JavaScript is interesting to me as I write mostly C/C++ code and hence already have the config for clang-format all set up, i.e. this would give me the possibility for all the JavaScript I (am forced to) write to look the same at the press of a button.