Upgrade Numpy version& h5py

+ I started using Anaconda 1.8 for MacOS and Linux (64 bits). It's Python 2.7.5 and updated versions of the main numerical packages (numpy, scipy) as well as the additional libraries the scientific library depends upon (scikits learn, networkx,).

Could we consider start shipping these versions with TVB distribution? There is a number of interesting new features in Numpy 1.7 that better handle some array operations, as well as some new function attributes that might result in neater code.