Add possibility to map one data field in template to more attributes
Add unit tests for io.pedestal.app.templates namespace
Refactor templates functionality, support singular, plural and
overlapping (same data field) fields in template markups
Add documentation for tnodes and dtfn functions in the
io.pedestal.app.templates namespace.
Further refactor and test changes from #60
Merge pull request #67 from rkneufeld/template-refactors

Add ability to map one data field to multiple template locations. Add unit tests and better documentation to io.pedestal.app.templates.