Add installation instructions for the example

[alexdmejias]

Can we add installation instructions for the included example? I ran npm install on the directory but I'm not sure where to go from there. It also looks like the webpack configuration relies on an old version, but I'm not 100% sure since I suck at webpack :P

[jpetitcolas]

Indeed, we should add a line on how to launch demo. Normally, just executing a make run should be enough. Can you try and open a PR? :)

[alexdmejias]

I would love to send a PR but I'm neither familiar with make or webpack :P. Also, running make run on the root dir spits outs

ERROR in multi main Module not found: Error: Cannot resolve module 'babel-loader' in /Users/alexmejias/Desktop/admin-on-rest/example @ multi main