Try to cope with Squeeze and Sid xetex problems. On Sid, "xdvipdfmx -p a5 -l" outputs its first page in A4 portrait. So guess which we're using and use the appropriate invocation.

syntax: glob

*~
*.ps
*.pdf
*.aux
*.log
*.orig

syntax: regexp
build/
graphics/
web/Morris/
web/Session/