Changes to NP_pyfits.py to support the reading and writing of unsigned integer 16 values.  The uint16=1 keyword argument must be supplied in the open convenience function.  Image HDU data with type int16 and BSCALE=32784 and BZERO=1 will be read in as uint16.  When written the data will berescaled and written out as int16 and the BSCALE/BZERO cards will be added to the header.
Changes to NP_pyfits.py to support the reading and writing of unsigned integer 16 values.  The uint16=1 keyword argument must be supplied in the open convenience function.  Image HDU data with type int16 and BSCALE=32784 and BZERO=1 will be read in as uint16.  When written the data will berescaled and written out as int16 and the BSCALE/BZERO cards will be added to the header.

git-svn-id: 5305e2c1a78737cf7dd5f8f44e9bbbd00348fde7@390 ed100bfc-0583-0410-97f2-c26b58777a21

embray/PyFITS,embray/PyFITS,embray/PyFITS,spacetelescope/PyFITS,embray/PyFITS,spacetelescope/PyFITS