Squashing asset pipeline bugs and other stuff

1. Update dependencies
   - Add font-awesome as dependency
   - Switch to Bootstrap 4 dev branch
   - Remove eslint airbnb style (we're not using it)

2. Imported images and fonts should go into dist/images
   and dist/fonts, respectively

3. Only lint our own code, not external code (fixes #1633)

package.json

@@ -21,8 +21,7 @@
     "build:production": "webpack -p --progress --release",
     "build": "webpack -d --progress",
     "watch": "node watch.js --watch",
-    "lint": "eslint -c .eslintrc assets/scripts watch.js webpack.config.js",
-    "install": "composer install"
+    "lint": "eslint -c .eslintrc assets/scripts watch.js webpack.config.js"
   },
   "engines": {
     "node": ">=4"
@@ -34,15 +33,15 @@
     "babel-core": "^6.7.4",
     "babel-eslint": "^6.0.0",
     "babel-loader": "^6.2.4",
-    "babel-preset-es2015": "^6.1.18",
+    "babel-preset-es2015": "^6.13.2",
     "babel-register": "^6.5.2",
+    "babel-runtime": "^6.5.0",
     "body-parser": "^1.14.1",
     "browser-sync": "^2.11.2",
     "clean-webpack-plugin": "^0.1.8",
     "css-loader": "^0.23.1",
     "cssnano": "^3.5.2",
     "eslint": "^3.2.2",
-    "eslint-config-airbnb": "^10.0.0",
     "eslint-loader": "^1.3.0",
     "eslint-plugin-react": "^6.0.0",
     "extract-text-webpack-plugin": "^1.0.1",
@@ -66,9 +65,8 @@
     "webpack-hot-middleware": "^2.10.0"
   },
   "dependencies": {
-    "babel-runtime": "^6.5.0",
-    "bootstrap": "^4.0.0-alpha.3",
-    "jquery": "^2.1.4",
-    "tether": "^1.2.0"
+    "bootstrap": "github:twbs/bootstrap#v4-dev",
+    "font-awesome": "^4.6.3",
+    "jquery": "^1.12.4"
   }
 }