added open_api_page function
Initial version of the astropy.constants docs
Add equivalency for f_nu <-> nu * f_nu
Add equivalency for f_lambda <-> lambda * f_lambda
added open_api_page function
Added option to get URL without opening in browser (and cleaned up docstring)
Fixed find_api_page so that modules will also be located correctly
Clarified docstring
Added test for find_api_page
Change logic for determining if ascii table should be masked
Move the [edit this page on github] link to the footer.
Change DAOphot to mark INDEF column values as missing (masked)
Add tests of INDEF and type changes to DAOphot reader
Fix python 3 and numpy 1.4 problems in io.ascii read tests
Merge pull request #663 from eteq/docs-lookup (with manual merge)

Conflicts:
	astropy/utils/misc.py
Revert "Merge pull request #663 from eteq/docs-lookup (with manual merge)"

This reverts commit 43607c237800e53799bd2de4936e743e3475d3e9, reversing
changes made to 7e7600d91a40af3b766acda26722ed0bd0a8fa96.
Merge pull request #663 from eteq/docs-lookup (with manual merge)

Note that this *replaces* 43607c237800e53799bd2de4936e743e3475d3e9 -
that was an incorrect merge from an out-of-date version of this branch.

Conflicts:
	astropy/utils/misc.py
Merge pull request #540 from astrofrog/constants-initial-docs

Create documentation page for astropy.constants
Sort the list of options in the ambiguous format error message so that the tests pass.
Merge pull request #511 from taldcroft/daophot-indef

io.ascii daophot pprint crashes on row with INDEF