Ngstrefftz

pypi on mac

update monomialfespace syntax

bug fixes, embtrefftz with hidden dofs

bug fixes, new monomial based embtrefftzspace, update stats for trefftzemb

update pip package to use ngsolve pre

Major cleanup of git history!!
Updated the python interface of trefftzfespace, moved to read-the-docs, added some functionality to embedded Trefftz.