news about the Rscript engine http://stackoverflow.com/q/15271406/559676
the `output` argument in process_file() is unused
child documents just return the compiled string; no longer write files for them

this should also solve the problem http://stackoverflow.com/q/15352935/559676
bin/knit no longer uses the --pdf argument
recompile all examples; changes are mainly due to the T1 encoding in my LyX preferences

the bib is also updated
roxygenize
bump version
Revert "the `output` argument in process_file() is unused"

This reverts commit e6beca70bef4564c00cd30cb23f1382f751bfae4.
fixed a bug reported by Matthias Studer: after rm_blank_plot(), res might be an empty list()
There should be no output to a file in child_mode
Merge pull request #504 from jtoloe/master

knit() should no longer output to a file in child_mode(); also closes #503
should remove '--no-convert' from arguments, otherwise the output filename will be '--no--convert'
Revert "fixed a bug reported by Matthias Studer: after rm_blank_plot(), res might be an empty list()"

This reverts commit 5a237095aea7215cec6b29d8d2f052a6feb5d9e6.
5a23709 was a careless fix; should still check if sum(figs) > 1 rather than >= 1

merge_low_plot() should do nothing if there are less than 2 plots
add @jtoloe to contributors
take the crap out: no longer supports child concordance
i is no longer in knit_concord
knit() will pass infile and outfile explicitly to concord_gen(), so no need to use default
make sure the input chunk numbers are of the same lengths as output chunks
be careful not to destroy the length of doc, because it is required by concordance