update lazybones-gradle plugin to version 1.2
[groovy-skeleton] update groovy library to 2.3.6
New Subtemplate Asciidoctor Version 0.1

Creates basic gradle asciidoctor subproject.
Its bundled to groovy-skeleton.

Had to switch back to lazybones-gradle plugin 1.1.
1.2 does not package the subproject into groovy-skeleton somehow.
Added README to subtmpl-asciidoc
Merge branch 'release/groovy-skeleton-0.3'
Merge tag 'groovy-skeleton-0.3' into develop

groovy-skeleton-0.3