Kinda-sortof verbatim implementation.  It doesn't handle unbalanced source commands though...
Hacked at parser to make it deal with "verbatim" as a sort of fake keyword, and everythign afterwards.
Merge branch 'kinda_sortof_verbatim' into verbatim

Conflicts:
	tests/src/erlydtl_unittests.erl
Tests pass.
Added verbatim to the list of supported tags.
Merge branch 'verbatim' of git://github.com/davidw/erlydtl