vigranumpy: added converters for numpy's number types
vigranumpy: added converters for numpy's number types

dagophil/vigra,dstoe/vigra,dagophil/vigra,funkey/vigra,funkey/vigra,dagophil/vigra,funkey/vigra,dstoe/vigra,dagophil/vigra,dagophil/vigra,dstoe/vigra,funkey/vigra,dstoe/vigra,funkey/vigra,funkey/vigra,funkey/vigra,dstoe/vigra,dstoe/vigra,dagophil/vigra,dstoe/vigra,dagophil/vigra