Merge pull request #936 from mdboom/docs/minimum-sphinx-version

graphviz syntax error generated by Sphinx 1.2b1
Merge pull request #1475 from astrofrog/fix-pytest-imports-2

Fixed imports of pytest
Merge pull request #1469 from mhvk/quantity-by-list-default-unit

For initialisation from list of quantities, default to unit of first
Changed default cosmology from WMAP7 to WMAP9
very minor fix in help for DEFAULT_COSMOLOGY
Updated cosmology docs for new WAMP9 default
Add citation to WMAP9 paper
DOIs for cosmology papers
fix for unicode literals by changing to six.u
Add extra note in changelog as suggested by @mdboom
stop the config tests from generating a configuration section in the .cfg file

closes #1476
Update version of Sphinx in .travis.yml
The version comparison in Sphinx is done only with the three first characters of the version number.
Try and use the developer version of Sphinx
Merge pull request #1478 from astrofrog/fix-sphinx-install

Update version of Sphinx in .travis.yml
Skip a test in the 0.2.x release series when Numpy 1.4.1 is used
Merge pull request #879 from astrofrog/fix-numpy14-failure

test_new_masked_col_existing_table needs to be skipped when Numpy 1.4.1 is used
doc formatting change
added eqiv to changes
doc update (tb equiv)