Merge pull request #2305 from embray/issue-2305

fits.PrimaryHDU doesn't properly initialize from scaled data
Merge pull request #2310 from mdboom/tests/how-to-skip-all-doctests

Include an example of how to skip all doctests in a module
Merge pull request #1953 from embray/issue-1953

Reading FITS file with boolean column gives incorrect result
Conflicts:

	astropy/io/fits/connect.py
	astropy/io/fits/tests/test_connect.py