Remove react-imageloader (#3423)

* Remove react-imageloader

* add eslint-disable-line

* improve image loading experience

* remove unneeded import

* use PureComponent

* Use componentWillMount instead of constructor

package.json

@@ -81,7 +81,6 @@
     "react-addons-perf": "^15.4.2",
     "react-addons-shallow-compare": "^15.5.2",
     "react-dom": "^15.5.4",
-    "react-imageloader": "^2.1.0",
     "react-immutable-proptypes": "^2.1.0",
     "react-immutable-pure-component": "^0.0.4",
     "react-intl": "^2.3.0",