Add simple jitclass example
Add simple jitclass example

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