Add error check and usage printout for grunt token creation
Fix token expiration calculation

account.js:sendToken() was calculating JWT expiration times incorrectly.
The JWT spec requires expiration times to be denoted in seconds since the
epoch, not milliseconds like the Date object. As a result, tokens were
lasting on the order of 1000 times too long.
Add separate token creation script not using grunt

Installs as 'svmp-create-token'
Merge branch 'token-minting' into console

Conflicts:
	package.json