Adapt print statements in examples for Python 3 compatibility
Remove Python 3 incompatible print statement
Fix kosaraju_strongly_connected_components documentation

The output is no longer ordered in a specific way.
Add 1.9.1 to release log
Bump version to 1.9.1
Remove unused file api_1.8
Remove bundled D3

References to D3 now point to cdnjs.
Add find_cycle()
Add example for find_cycle.
Docstring updates.
Minor docstring edit.
Update docstrings and unit tests.
Merge pull request #1223 from ysitu/d3

Remove bundled D3
Correct doctest in find_cycle.
Add 1.9.1 release date
Change version to 1.9.1rc1
corrected docstring

The docstring of connected_component_subgraphs() had one parameter (copy=True) listed as a Return.
Add dominating package to documentation
Change path to MathJax CDN

See http://www.mathjax.org/changes-to-the-mathjax-cdn/ for details
Merge pull request #1245 from ysitu/dominating

Add dominating package to documentation