Migrate documentation to asciidoc

[judithek]

REC: Migrate documentation to asciidoc This issue was updated by revision r781.

• Started migrating user documentation
• Formatted root pom
• Manage some dependencies through version properties that we can also pick up in the documentation This issue was updated by revision r782.
• Missing license file This issue was updated by revision r783.
• Developer docs This issue was updated by revision r784.
• Disable PDF due to: (NotImplementedError) fstat unimplemented unsupported or native support failed to load This issue was updated by revision r785.
• Clean up TOC This issue was updated by revision r786.
• Fix tables This issue was updated by revision r787.
• Fix tables This issue was updated by revision r788.
• Format fixing

JEK: these user guide pages contain current content and need formatting:

db-import.adoc external-system-naming.adoc faq.adoc groovy.adoc setup.adoc

no formatting required for these developer guide pages (they will be deleted and replaced either by tutorial content or by an example module): (why can adoc files have the same name? - there are 2 setup.adoc files)

api.adoc conversion.adoc setup.adoc

[judithek]

as far as I can see, @reckart has migrated everything to asciidoc