Fixed Makefile.commont to change CLAW/util to CLAWUTIL

Also added clawcode2html.py to clawutil and fixed Makefile.common to point to this.  Need to add other required files for html, e.g. doc.css and jsMath somewhere.  Or MathJax?  Or reconsider using this system at all?

src/Makefile.common

@@ -131,7 +131,7 @@ debug:
 #----------------------------------------------------------------------------
 
 # Command to create *.html files from *.f etc:
-CC2HTML = $(CLAW_PYTHON) $(CLAW)/doc/clawcode2html.py --force 
+CC2HTML = $(CLAW_PYTHON) $(CLAWUTIL)/src/python/clawutil/clawcode2html.py --force 
 
 # make list of html files to be created by 'make .htmls':
 HTML = \
@@ -182,7 +182,7 @@ data: $(MAKEFILE_LIST);
 # Run the code without checking dependencies:
 output: $(MAKEFILE_LIST);
 	-rm -f .output
-	$(CLAW_PYTHON) $(CLAW)/clawutil/src/python/clawutil/runclaw.py $(EXE) $(OUTDIR) \
+	$(CLAW_PYTHON) $(CLAWUTIL)/src/python/clawutil/runclaw.py $(EXE) $(OUTDIR) \
 	$(OVERWRITE) $(RESTART)
 	@echo $(OUTDIR) > .output