Add missing requirements
Add missing requirements

 * So that make build target works

 setuptools is redundant in requirements

 * If you distribute a file with setuptools (pip, virtualenv and so)
   It's OK to assume setuptools is pre-existing

Coxious/python-nvd3,mgx2/python-nvd3,BibMartin/python-nvd3,BibMartin/python-nvd3,pignacio/python-nvd3,mgx2/python-nvd3,BibMartin/python-nvd3,Coxious/python-nvd3,liang42hao/python-nvd3,liang42hao/python-nvd3,vdloo/python-nvd3,vdloo/python-nvd3,mgx2/python-nvd3,vdloo/python-nvd3,oz123/python-nvd3,oz123/python-nvd3,oz123/python-nvd3,yelster/python-nvd3,pignacio/python-nvd3,liang42hao/python-nvd3,pignacio/python-nvd3,yelster/python-nvd3,Coxious/python-nvd3,yelster/python-nvd3