Suggestion - Add 'show code' section to the demo pages

[edwinyzh]

This is a very very cool project, Bulma css is very human-friendly and looks nice out of the box already, and vue-admin take the visual effects to a new level, the demo pages are quick (I hate heavy pages :P) and lightweight, well done, bro!

Just one suggestion - if it's possible - add 'show code' sections to each demo pages, so that one can easily check the code behind and knows how it works.

[fundon]

Good sounds. I like this idea.

[luventa]

landed