Major overhaul! A bunch of improvements and simplifications.

Update pom.xml

update jackson

Fixing location of module-info and updating version

Updating module-info to be correct, and updating dependencies in pom.xml to enable the new release to be made.

Support for markdown posts and other minor improvements

Add a bit more readme text

Make it possible for sitebuilder subclasses to provide custom properties for posts and pages, also add support for the 'page' property and bump the version so I can do another release.

Initial import of site builder tool