Content blocks, web wizard and blog engine

The blog customization has been completely revisited with the support of arrangeable content blocks.
The app now also contains a web wizard to speed up the config, and a web service that serves personalized blogs with an auto-config domain.

v0.4

Add dark theme

v0.3

Build dist file and examples

v0.2

Build dist file and examples

v0.1

Update dist and examples