Add unit test for Schechter1D
Add unit test for Schechter1D

astropy/astropy,larrybradley/astropy,larrybradley/astropy,StuartLittlefair/astropy,pllim/astropy,StuartLittlefair/astropy,saimn/astropy,larrybradley/astropy,saimn/astropy,saimn/astropy,lpsinger/astropy,StuartLittlefair/astropy,saimn/astropy,pllim/astropy,astropy/astropy,StuartLittlefair/astropy,astropy/astropy,mhvk/astropy,astropy/astropy,larrybradley/astropy,pllim/astropy,lpsinger/astropy,pllim/astropy,mhvk/astropy,lpsinger/astropy,lpsinger/astropy,lpsinger/astropy,mhvk/astropy,mhvk/astropy,saimn/astropy,astropy/astropy,pllim/astropy,larrybradley/astropy,mhvk/astropy,StuartLittlefair/astropy