Support logarithmic units in HDF5 tables.
Support logarithmic units in HDF5 tables.

astropy/astropy,aleksandr-bakanov/astropy,pllim/astropy,larrybradley/astropy,astropy/astropy,StuartLittlefair/astropy,saimn/astropy,aleksandr-bakanov/astropy,lpsinger/astropy,dhomeier/astropy,saimn/astropy,mhvk/astropy,StuartLittlefair/astropy,mhvk/astropy,dhomeier/astropy,lpsinger/astropy,dhomeier/astropy,mhvk/astropy,astropy/astropy,larrybradley/astropy,StuartLittlefair/astropy,dhomeier/astropy,lpsinger/astropy,StuartLittlefair/astropy,aleksandr-bakanov/astropy,saimn/astropy,astropy/astropy,mhvk/astropy,pllim/astropy,astropy/astropy,pllim/astropy,pllim/astropy,aleksandr-bakanov/astropy,pllim/astropy,lpsinger/astropy,dhomeier/astropy,mhvk/astropy,larrybradley/astropy,larrybradley/astropy,larrybradley/astropy,StuartLittlefair/astropy,saimn/astropy,lpsinger/astropy,saimn/astropy