Allow .clang-format (#106)

ktf · awegrzyn · commit 268c3670bf61 · 2019-01-18T14:16:00.000+01:00
New logic in AliceO2Group/CodingGuidelines will sync it from a central place.
diff --git a/.gitignore b/.gitignore
@@ -4,4 +4,3 @@
 *~
 .idea
 examples/config.ini
-.clang-format
