You need to have node.js, npm and bower installed in you system for client side stuff.
For the server side functionality, this sample application uses latest ASP.NET 5. You can isntall ASP.NET 5 by following the directions here. Once you have dnvm, run dnvm upgrade to get the latest stuff.
Navigate to src directory and run the following commands to make everything available
npm install
bower install
gulp
These commands will install node modules, bower components and run the default gulp task which will make everything ready in terms of client side stuff.
To get it up and running, run the following commands while you are on src:
kpm restore
dnx . web
You can now navigate to http://localhost:5001/ and you will have the sample ready.