Add imperative documentation guide
Configuration page update for 'mode' key
Add 0.19.0 release post
Move and rename sections
Arduno + Button + LED example
Calling it 'Fluent' syntax
Fix title
Better intro sentence for fluent section
Add declaritive example alongside fluent one
Merge pull request #55 from hybridgroup/0.19-blog-post

Add declaritive example alongside fluent one
Rename blog post file
Embargo post till tomorrow
Merge branch 'master' into hue-docs