-p flag for auto-publish on staged commands

[riyazdf]

It'd be nice to have a -p flag (or similar) to automatically attempt to publish after staging a change in a notary CLI command. For example: notary init -p, notary add -p, notary remove -p, notary delegation add -p, notary delegation remove -p, and notary addhash -p

[HuKeping]

Add command list:

• notary init -p
• notary add -p
• notary remove -p
• notary delegation add -p
• notary delegation remove -p
• notary addhash -p