readme.md now links to hdf-ni.github.io, re #22
readme.md now links to hdf-ni.github.io, re #22

For better consistency, the documentation links in the readme.md file now link to <http://hdf-ni.github.io/hdf5.node/>. This makes it clearer that this documentation is tightly coupled to the current github project, re #22. Also simplified links with markdown automatic links (brackets only) instead of redundant raw HTML anchors.
HDF-NI/hdf5.node,HDF-NI/hdf5.node,ryancole/hdf5.node,ryancole/hdf5.node,HDF-NI/hdf5.node,ryancole/hdf5.node