readme edits
readme edits


Former-commit-id: a7b472b3697439978439f092ee23a764eb8c66e6
Former-commit-id: 2edb95c3770b10edfdeb86430215467c632d4199
matt-gardner/deep_qa,allenai/deep_qa,DeNeutoy/deep_qa,allenai/deep_qa,DeNeutoy/deep_qa,matt-gardner/deep_qa