Fix behavior of scaled columns in binary table
Fix behavior of scaled columns in binary table

Once a column with a tscale or tzero keyword is scaled, it was not
marked as such. So if the column was modified and then saved, the old
(unscaled) values when saved instead.

It seems that all what was missing was to put the `_physical_values`
flag to True.

DougBurke/astropy,astropy/astropy,MSeifert04/astropy,lpsinger/astropy,MSeifert04/astropy,astropy/astropy,larrybradley/astropy,MSeifert04/astropy,saimn/astropy,mhvk/astropy,bsipocz/astropy,bsipocz/astropy,lpsinger/astropy,StuartLittlefair/astropy,lpsinger/astropy,DougBurke/astropy,astropy/astropy,dhomeier/astropy,larrybradley/astropy,aleksandr-bakanov/astropy,aleksandr-bakanov/astropy,bsipocz/astropy,funbaker/astropy,mhvk/astropy,StuartLittlefair/astropy,astropy/astropy,dhomeier/astropy,bsipocz/astropy,stargaser/astropy,dhomeier/astropy,pllim/astropy,larrybradley/astropy,larrybradley/astropy,astropy/astropy,pllim/astropy,dhomeier/astropy,saimn/astropy,StuartLittlefair/astropy,funbaker/astropy,saimn/astropy,lpsinger/astropy,aleksandr-bakanov/astropy,pllim/astropy,stargaser/astropy,saimn/astropy,pllim/astropy,funbaker/astropy,larrybradley/astropy,funbaker/astropy,mhvk/astropy,stargaser/astropy,mhvk/astropy,saimn/astropy,DougBurke/astropy,aleksandr-bakanov/astropy,dhomeier/astropy,mhvk/astropy,StuartLittlefair/astropy,pllim/astropy,stargaser/astropy,StuartLittlefair/astropy,lpsinger/astropy,MSeifert04/astropy,DougBurke/astropy