Add mean option to ZINB loss as well
Add mean option to ZINB loss as well


Former-commit-id: b68b8aaffbc61df21d4059615b487fd5fa6cf193 [formerly 2a679c29c8abe8a2ddd4f49fee531ab180f1dfd5] [formerly a247892a60762dc34d296b4f8ad785f8b66020f3 [formerly b4054c304f35eab92df7314b56ee864d383a4c6b]]
Former-commit-id: 348de8df36aca615317c8cb0e17ab81ae4ba4e23 [formerly de716214c641b1c5bfc8fc377a9a1aef04bff249]
Former-commit-id: eef520cc7479b92991ef9d9744b3b7d56ffba1a6
Former-commit-id: 606b37fc0bb6d573a104304b880212d9e5a6acb1
Former-commit-id: fd88ee1a3f5b15b4b9aa37d4fedf5c8087f79f97
theislab/dca,theislab/dca,theislab/dca