added THTensor_(renorm) prototype
added THTensor_(renorm)
cwrapped torch.renorm
renorm only renormalizes rows with greater norms than maxnorm
started renorm unit tests
renorm works (debugged and unit tested)
Merge branch 'master' of github.com:torch/torch7
Added renorm doc to maths.md
Added dropout ref. and equivalent code for renorm
unit test uses same function as in doc
Merge branch 'master' of github.com:nicholas-leonard/torch7
renorm does not accept vectors
fixed argchecks
optimized power of 1 and 2
Merge pull request #42 from nicholas-leonard/master

torch.renorm