Add microdata support and helpers for creating RDFa/microdata contexts
Output xml:lang attribute in literal helper
Fix getArray if key is not set
Change site:TemplateOption to be a rdf:Property
Reorganize example model and layout indention
Use TemplateOptions to set main navigation
Fix typos in example model
add site:fetchOptionsFrom, add issued+modified
Add literals helper, which returns all values concatenated
Add template options from site:fetchOptionsFrom
Fix #28. Also look into the transitive closure to get template name.
[mod] use double quotes for values of html attributes, to keep it more standardized
Merge branch 'develop' of https://github.com/AKSW/site.ontowiki into develop
[mod] use double quotes for values of html attributes, to keep it more standardized
[mod] add lang parameter additionally to xml:lang to keep code valide
Static values in literal helper

When only markup is needed.
Use static
Allow array values for rel and rev
Fix empty rel and rev
Handle img, link and other empty elements