Remove references to deleted files in MANIFEST.in
Clarify required Python versions
Suggest release date
Change version in release.py
Networkx-1.9, June 21 2014
correct minor typos in edgelist.py
Merge branch 'v1.9'

Conflicts:
	doc/source/install.rst
Merge pull request #1198 from barry/master

correct minor typos in edgelist.py
Fix misformatted example in cycles.py

Addresses #1196.
Adapt print statements in examples for Python 3 compatibility
Merge pull request #1204 from ysitu/print

Adapt print statements in examples for Python 3 compatibility
Improve .travis.yml formatting
Remove Python 3 incompatible print statement
Merge pull request #1205 from michaelsproul/print-function-fix

Remove Python 3 incompatible print statement
corrected docstring

The docstring of connected_component_subgraphs() had one parameter (copy=True) listed as a Return.
Merge pull request #1207 from drevicko/patch-1

corrected docstring
Include IronPython in .travis.yml
Merge pull request #1209 from ysitu/ipy

Test with IronPython on Travis
Fix unreliable tests uncovered by IronPython
Make katz_centrality compatible with IronPython