Update changelog for 0.30.0 release
Update changelog for 0.30.0 release

sklam/numba,gmarkall/numba,jriehl/numba,IntelLabs/numba,seibert/numba,sklam/numba,sklam/numba,seibert/numba,seibert/numba,gmarkall/numba,stonebig/numba,IntelLabs/numba,stuartarchibald/numba,cpcloud/numba,numba/numba,jriehl/numba,IntelLabs/numba,numba/numba,stuartarchibald/numba,stonebig/numba,IntelLabs/numba,cpcloud/numba,stuartarchibald/numba,IntelLabs/numba,numba/numba,gmarkall/numba,stuartarchibald/numba,gmarkall/numba,cpcloud/numba,jriehl/numba,stonebig/numba,stuartarchibald/numba,cpcloud/numba,sklam/numba,numba/numba,jriehl/numba,stonebig/numba,jriehl/numba,sklam/numba,stonebig/numba,seibert/numba,gmarkall/numba,numba/numba,cpcloud/numba,seibert/numba