Add .clang-tidy file for O2 code checker

PascalBoeschoten · PascalBoeschoten · commit 9ce3d52645d8 · 2017-09-29T12:08:30.000+02:00
diff --git a/.clang-tidy b/.clang-tidy
@@ -0,0 +1,3 @@
+CheckOptions:
+  - key: CheckPathRegex
+    value: '.*/ReadoutCard/.*'
