Add reasonable defaults to prettier.

.prettierrc

@@ -1 +0,0 @@
-tabWidth: 4

.prettierrc.js

@@ -0,0 +1,9 @@
+module.exports = {
+    "tabWidth": 4,
+    "useTabs": true,
+    "trailingComma": "all",
+    "jsxBracketSameLine": true,
+    "importOrder": ["/(lib)", "/(redux)", "/(context)", "/(ui|common)|.svg$", "^[./]"],
+    "importOrderSeparation": true,
+}
+