attempt fix #1458
Merge remote-tracking branch 'origin/1458'

* origin/1458:
  attempted fix
update to latest lantern-ui
update to latest lantern-ui
update to latest lantern-ui
Installer grabs configurl from filename
Installer grabs configurl from filename
change the bucket to which we upload installers

This is for the benefit of the last people to get old-style invite
emails.
Ubuntu postinstall script now populates configurl based on filename
Ubuntu postinstall script now populates configurl based on filename
Merged
Increased precision of expiration
Comment updates in configureUbuntu.txt
Merge pull request #1558 from getlantern/s3filename

Merge changes to generate lantern-configurl.txt based on installer filename on Ubuntu