cubicweb #2955591 [doc] add links to code [deprecated]

The idea would be to add a link for each class/function to the source code (in hgweb I guess). See the [source] link in upper right corner of, e.g. http://docs.scipy.org/doc/numpy/reference/generated/numpy.fft.fft.html

This can be done with the linkcode Sphinx extension (which exists as of version 1.2).

prioritynormal
typeenhancement
done in<not specified>
load0.000
load left0.000
closed by<not specified>