added paths.uname()
gnuplot uses paths.uname() to identify os.
fixed lua_uname() code for windows
added paths.findprogram and adjust gnuplot.lua
more aggressive program search (win)
fix for path.findprogram
clean quotes in results from paths.findprogram
paths.findprogram takes multiple args
Added support for the partialSum parameter to the SpatialConvolutionCUDA module.
Merge pull request #164 from vladmnih/cuda

Added support for the partialSum parameter to the SpatialConvolutionCUDA...
readObject can be forced to reread from file using referenced flag.
Merge branch 'master' of github.com:andresy/torch
Merge remote-tracking branch 'andresy/master' into andresy