To also clean up bibtex-generated files.

git-svn-id: https://tufte-latex.googlecode.com/svn/trunk@35 516e2f36-ce3a-0410-bea4-1d4a03f5df72

release

@@ -59,7 +59,7 @@ pdflatex sample-handout >  refresh-sample.log
 bibtex   sample-handout >> refresh-sample.log
 pdflatex sample-handout >> refresh-sample.log
 pdflatex sample-handout >> refresh-sample.log
-rm -f sample-handout.{aux,log,out} refresh-sample.log
+rm -f sample-handout.{aux,log,out,blg,bbl} refresh-sample.log
 
 # For googlecode upload, make a distinct version of sample-handout:
 cp sample-handout.pdf sample-handout-$version.pdf