Added minibatch support to MarginRankingCriterion and PairwiseDistance.
Document qt terminal for gnuplot
Add support for PDF in figprint if gnuplot supports

Gnuplot support for pdf is enabled in homebrew with
`brew install gnu plot --pdf``
Document pdf for figprint
Document svgfigure

It was undocumented, yet can be useful.
Send error if gnuplot does not have pdf support
Add function pdffigure()
Document pdf possibilities
Document in main description, too
Fix typo in description of eps terminal
fixed a bug in CUDA norm
Merge pull request #163 from vladmnih/batch

Added minibatch support to MarginRankingCriterion and PairwiseDistance.
Merge pull request #175 from 2ndforks/master

fixed a bug in CUDA norm
Missing a free (pow, CUDA)
correct the stochastic case check
Merge branch 'master' of github.com:torch/torch7-distro
Merge pull request #174 from jucor/pdfwrite

Add support for PDF if gnuplot supports
Merge pull request #173 from jucor/svgdok

Document svgfigure
Merge pull request #171 from jucor/gnuplotqt

Document qt terminal for gnuplot
init self.output with a single element tensor, not an empty tensor