Add Phabricator integration

.arcconfig

@@ -0,0 +1,11 @@
+{
+  "load": [
+    "material-arc-tools/third_party/arc-hook-conphig",
+    "material-arc-tools/third_party/arc-hook-github-issues",
+    "material-arc-tools/third_party/arc-proselint"
+  ],
+  "arcanist_configuration": "HookConphig",
+  "phabricator.uri": "http://codereview.cc/",
+  "arc.land.onto.default": "develop",
+  "arc.feature.start.default": "origin/develop"
+}

.arclint

@@ -0,0 +1,25 @@
+{
+  "linters": {
+    "chmod": {
+      "type": "chmod"
+    },
+    "prose": {
+      "type": "prose",
+      "include": "(\\.(md)$)",
+      "exclude": [
+        "(^CHANGELOG.md)"
+      ],
+      "severity": {
+        "consistency.spacing": "disabled",
+        "typography.symbols.curly_quotes": "disabled",
+        "typography.symbols.ellipsis": "disabled",
+        "leonard.exclamation.30ppm": "disabled",
+        "misc.annotations": "warning"
+      }
+    },
+    "spelling": {
+      "type": "spelling",
+      "include": "(\\.(md)$)"
+    }
+  }
+}