working version of momentum. switches after first epoch
working version of momentum. switches after first epoch

amaas/stanford-ctc,amaas/stanford-ctc,xiamike/stanford-ctc,xiamike/stanford-ctc,xiamike/stanford-ctc,xiamike/stanford-ctc,amaas/stanford-ctc,amaas/stanford-ctc,amaas/stanford-ctc,xiamike/stanford-ctc,xiamike/stanford-ctc,amaas/stanford-ctc