As I set up the test case for the glossary and nomencl packages

As I set up the test case for the glossary and nomencl packages
I found that when only one tool (say pdftex) is initialized
that some of the actions for bibtex... are not created.

Moved most common actions and environment settings to one routine
in tex.py that the other text tools (pdftex, pdflatex, latex) call.

Also fixed a typo in the nomenclature action setup. There was
a '$' that should not have been there.

git-svn-id: http://scons.tigris.org/svn/scons/trunk@4337 fdb21ef1-2011-0410-befe-b5e4ea1792b1