Polish
Add documentation tool-chain

Generate html, pdf and epub documentation using asciidoctor+docbook.

See gh-295
Add initial reference manual documentation

See gh-295
Port "how-to" section to the reference manual

Copy the existing markdown How-to readme content to the user manual,
converting to asciidoc.

See gh-295
Add cloud deployment documentation

Add a "cloud deployment" section to the Spring Boot reference
manual.

See gh-295
Merge reference documentation branch

Fixed gh-295