updated CHANGELOG in preparation for v0.3.1 release
updated CHANGELOG in preparation for v0.3.1 release

gmcvicker/WASP,gmcvicker/WASP,bmvdgeijn/WASP,gmcvicker/WASP,bmvdgeijn/WASP,bmvdgeijn/WASP,gmcvicker/WASP,bmvdgeijn/WASP