Merge pull request #744 from astrofrog/unit/fix-quantity-big-endian-bug

Issues with big endian Numpy arrays in Quantity
Merge pull request #747 from mdboom/wcs/double_free

Fix a double-free exception in `astropy.wcs.find_all_wcs()`
Merge pull request #731 from taldcroft/table-name-kwarg

Make Column or MaskedColumn name arg be a keyword arg name=None
Merge pull request #750 from mdboom/update_year

Update copyright years
Sort the methods and attributes of classes in the class summary, otherwise, they appear in arbitrary dictionary ordering which isn't very useful.
Merge pull request #762 from eteq/make-quantity-immutable

Make quantity immutable