Update time-grunt to v0.3.1.
Update time-grunt to v0.3.1.

BS3 commits: 30cc625c5c686f00af15a926f9437cb0e3fdff42

todc/todc-bootstrap,aaroncnhk/todc-bootstrap,todc/todc-bootstrap,mozillo/todc-bootstrap,2947721120/todc-bootstrap,up2vs/todc-bootstrap,2947721120/googlebt4,todc/todc-bootstrap,ztx1491/todc-bootstrap