[#62802482] [#62996658] [#62808308] [#63112276]

[#62802482] checked with various cases for auhor_cocitations graph.
Will update the code with some updates and finish the story
[#62996658] coding completed but not marking this as 'finish' in PT
because its corresponding test cases story is not over.
[#62808308] changes made, but some parts are commented as they were
throwing few errors. will continue on monday.
[#62996658] This one is over. Now author_cocitations works w.r.t to the
user input threshold and some logics of previous version were corrected.
[#62802482] Test cases of the aforesaid story. Checked almost all cases
and found OK.
[# 63112276] no errors will be found in networks_test.py.
Authors.Coauthors.py had some errors, mainly because of the story
#62808308 which I am working on. That part will be uncommented once I
start on the test cases for coauthors.
[#62820502] tried pylint and deleting the extra spaces > 80 chars in
readers.wos, network_test.py , networks.authors.py. Some part of these
modules and other scripts as well, are remaining.
[#62808308] changes done in coauthors.

The Edge attributes list of dictionaries is not getting populated
properly. Checking on that issue.
[#62808308] [#63501138]

[#62808308] The code for co-authors is over, networks is created as a
normal graph rather than a multigraph, with edge attribs as a list for
each user input. Only issue pending is TypeError thrown while trying to
visualize it in gexf format ( not related to this story though). Once
that is over I will 'finish' it in PT and merge it to 'python' repo.

[#63501138] Test cases for the #62808308. Its over. Just need to add 2
more cases and align the code according to 80 chars length.
[#62808308][#63501138]

[#62808308] Co-authors graph returns a normal graph with
edge_attributes as list when  2 authors share more than one common
paper.
[#63501138] Test cases for the aforesaid method is over.  Checked the
Edge attires as the main case for different user inputs.
Merge branch 'ramki' into python