sgr-example py2.6 and style fixes
sgr-example py2.6 and style fixes

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