Working fix for unsigned int conversions
Convert print statement to warning
All uint tests now working
missing colon
parametrize test and other minor changes
Also parametrize uint image tests
fully parametrize uint tests
Fix different hdu number in compressed files.  Also, closes #362 and closes #880
Disable test of 64-bit compressed image
add placeholder for uint parameter
Fix bad except statement
Fix test parameter
Restructure test parameters
Change the way column attributes are assigned
Removed --enable-legacy option
Allow for `kind` kwarg to Table.argsort
Use mergesort alg for groups sorting to maintain order
Fall through to default quicksort if mergesort fails
Add .cgs and .si convenience properties to Unit, to be in line with Quantity.  Fix #1610
Add unicode and latex aware liter symbol