bootstrap numpy and scipy installation inside setup.py

[kaushik-rohit]

Currently we are using setup.py for packaging and installing dependencies but it has problem in installing scikit-learn.Since setup.py installs dependencies in no fixed order and as scikit-learn uses scipy and numpy, it is possible it tries to install scikit learn before installing scipy/numpy which we create an error.

Currently what we are doing is installing numpy and scipy outside the setup.py and importing them inside setup.py which is not the desired way.
Scipy is using a better hack to resolve the same issue.

Some related discussion
pypa/pip#2381
http://stackoverflow.com/questions/19919905/how-to-bootstrap-numpy-installation-in-setup-py

Can also have a look at the setup.py file for scipy or matlabplotlib.

It will be good to have this issue resolved quickly.