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.
show an informative error message when passing a bad aspect to watch
enable logging of deltas to the console by default in the app template
get the correct logging key from application config when setting up the render view
add functions to remove events to the events namespace

This change prevents us from having to require other namespaces in
order to remove events.
make a new namespace for generic rendering handler functions
Further refactor and test changes from #60
Merge remote-tracking branch 'rkneufeld/template-refactors'
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.
delete whitespace
move doc string to correct location
Test ServletInputStream now behaves the same as production, when entity body is empty.
Don't throw exception on empty request body
Body params test context values are not reusable.
update app template to work with new dataflow engine
Merge branch 'master' of https://github.com/pedestal/pedestal
Make emitted app-tools template JS includes absolute