resolve #313 with CRAN specs as brew got a few commits since 2011

fix #331 shQuote pandoc binary

Merge branch 'master' of github.com:Rapporter/pander

Apply to.plain.ascii to values before calculation of column widths, but leave handling the colnames and rownames as they were.

fix #323 indent +1 in recursive call instead of by level

test pander.list especially with empty list