Merge pull request #142 from tanmaykm/tanmaykm

minor refactors
Merge pull request #144 from tanmaykm/tanmaykm

auto account activation, better startup experience, Julia v0.3.3
Merge pull request #145 from tanmaykm/tanmaykm

dockerfile updates
Merge pull request #146 from tanmaykm/tanmaykm

update julia packages on running instances
Merge pull request #148 from tanmaykm/tanmaykm

use install_id as cluster id. fix user count query.
Merge pull request #149 from tanmaykm/tanmaykm

activate user if login reattempted at lean time
update messages
refresh all disks on startup and on new user image