Merge pull request karlstav#292 from quantum5/clang-format

Use clang-format to ensure a consistent style

Author: karlstav

.clang-format

@@ -0,0 +1,6 @@
+BasedOnStyle: LLVM
+---
+Language: Cpp
+PointerAlignment: Right
+ColumnLimit: 100
+IndentWidth: 4

CONTRIBUTING.md

@@ -9,7 +9,7 @@ Thank you for wanting to contribute to this project. In order to get the develop
 5. Github task is updated and everyone is notified.
 
 # Coding conventions
-* tab for indents
+* 4 spaces for indents
 * curly braces on same line as if, while, for statements
 
 Generally please try to keep the style consistent with the code as it is.