add prettier as dependency and precommit script (#1778)

add prettier.js as dependency and precommit script

.prettierignore

@@ -0,0 +1,5 @@
+locale
+node_modules
+static
+package.json
+package-lock.json

.prettierrc

@@ -0,0 +1 @@
+singleQuote: true

package.json

@@ -35,6 +35,7 @@
     "extract-text-webpack-plugin": "^1.0.1",
     "file-loader": "^0.8.5",
     "font-awesome": "^4.4.0",
+    "husky": "^0.14.3",
     "immutable": "^3.4.7",
     "jquery": "^3.3.1",
     "jquery-ui": "1.12.1",
@@ -59,6 +60,8 @@
     "opn": "^3.0.2",
     "postcss": "^5.2.15",
     "postcss-loader": "^1.3.3",
+    "prettier": "^1.12.1",
+    "pretty-quick": "^1.4.1",
     "q": "^1.4.1",
     "react": "^15.6.0",
     "react-autobind": "^1.0.6",
@@ -96,7 +99,8 @@
     "watch": "node webpack/dev.server.js",
     "test-server": "node webpack/test.server.js",
     "test": "webpack --config webpack/test.config.js --progress --colors && mocha-phantomjs test/tests.html",
-    "copy-fonts": "python ./scripts/copy_fonts.py"
+    "copy-fonts": "python ./scripts/copy_fonts.py",
+    "precommit": "pretty-quick --staged"
   },
   "repository": "https://github.com/kobotoolbox/kpi.git",
   "author": "alex.dorey@kobotoolbox.org, esmail.fadae@kobotoolbox.org, john.milner@kobotoolbox.org",