Bug#911162: pybel : BEL vs Babel

[Steffen Möller <steffen_moeller@gmx.de>]

I messed this one up, biblical proportions, so to say, by confusing the 
BEL as in "Biological Expression Language" from github repository 
https://github.com/pybel/pybel with the module provided by OpenBabel, 
which is about reformatting molecular data between different formats 
(and a bit more). As embarrassing as this now is, as helpful can it 
possibly be for us to get it right.

PLIP demands the latter. And this apparently goes with 
/usr/lib/python2.7/dist-packages/pybel.py of the python-openbabel package.

Just for the sake of completeness, there is also python-babel, which 
again is needed by sphinx.

So, let this ITP be about the BEL language's pybel. So, the package 
would be python-pybel with a description clearly indicating that this is 
very independent from the other *bel python packages.

Cheers,

Steffen