Add v2.0.1 to the changelog
Add v2.0.1 to the changelog

astropy/astropy-helpers,bsipocz/astropy-helpers,Cadair/astropy-helpers,bsipocz/astropy-helpers,bsipocz/astropy-helpers,dpshelio/astropy-helpers,Cadair/astropy-helpers,dpshelio/astropy-helpers,astropy/astropy-helpers