* starting unification of TDNode TDTag. mess
* XPBaseExpressionTests
* tag unify improvements
* unifying tag and node. not done.
* unifying
* unification working. tests passing. holy mess
* cleanup
* cleanup
* cleanup
* cleanup
* cleanup
* cleanup. update temp parser
* cleanup
* cleanup
* cleanup in ctx
* cleanup. remove suppressRendering
* simplifying verbatim
* verbatim cleanup
* cleanup
* cleanup