Fixed logger for Python 3.4
Fixed format calls for Python 3.4
Fixed cosmology test for Python 3.4
Implement suggestions from @mdboom by removing :s from e.g. {0:s} since the :s is redundant and does not work in Python 3.4
Added changelog entry for #1945--originally this as added for 0.3.1, but the fix was never merged to the 0.3.x branch.
This change to itersubclasses restores some determinism to it on Python 3.4.  See https://github.com/astropy/astropy/pull/1945#issuecomment-32522217

Conflicts:

	astropy/io/fits/util.py
Non-integer shapes will be unsupported in a future version of Numpy.
Fix deprecated Numpy dtype where a length is given for "l"
Fix creation of column mask in example.
Avoid DeprecationWarning from Numpy.
This should be 64-bit.
Fix HDF5 test that wasn't collecting warnings correctly.
Be more careful about restoring the warning state.
Fix conesearch test failure under Python 3.4