[#62657522][#62809656] changes done almost

One query has been asked in gist. If that is over only test cases are
remaining.
[#62657522][#62996658]

#62657522 - one query, unless code change is reqd, it is complete.

#62996658 - one query, here as well,except which it is over.
[#62657522][#62802482]

checking some stuffs.
[#62808308] changes done in coauthors function.

It is half way down.
[#62657522] working fine for paper_cocitations the citation count

checked with various test criteria and various threshold limits. Now
the citation count for each paper which is being cited by another paper
in the dataset is correctly displayed as a node attribute
[#62809724] for  author_cocitations

1. Getting wrong co_citation values for some papers.checking it.
ie when there are 2 authors with different ayjids they are counted
twice.

2. Got an TypeError which I have raised as a new story.
[#63112276][#62818800][#62818790]
changes are done in the init.py of tethne.networks and some changes in citations.py script.
Commits were not reflected in PT and git, hence committing again.
[#63112276] changes done to remove the error 'no module named dagfunctions.py'
changes in __init.py and citations.py

[#62818790] changes done to remove error
"AttributeError: 'module' object has no attribute 'ancestors'"

[#62818800] changes done to remove error
"AttributeError: 'module' object has no attribute 'descendants'"
[#63128668] changes in network_test.py and checked with network output. they are correct.
ramki@ubuntu:~/git/tethne/testsuite$ python -m unittest -v networks_test
test_node_attribs_check (networks_test.TestAuthorCoinstitution) ... ok
test_shared_institutions_one (networks_test.TestAuthorCoinstitution) ... ok
test_shared_institutions_two (networks_test.TestAuthorCoinstitution) ... ok
test_shared_institutions_zero (networks_test.TestAuthorCoinstitution) ... ok
Merge branch 'python' into ramki

Conflicts:
	tethne/networks/__init__.py
	tethne/networks/authors.py
	tethne/networks/papers.py
Committing the init.py, authors.py and papers.py
Merge branch 'ramki' into python

Conflicts:
	.DS_Store