Added clang-format (#623)

* added .clang-format
* added names to travis jobs
removed deprecated travis option
* check github action
* added .gitignore

package.json

@@ -1,6 +1,6 @@
 {
-    "scripts": {
-      "docs:dev": "vuepress dev docs",
-      "docs:build": "vuepress build docs"
-    }
-  }
+  "scripts": {
+    "docs:dev": "vuepress dev docs",
+    "docs:build": "vuepress build docs"
+  }
+}