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
change the bucket to which we upload installers

This is for the benefit of the last people to get old-style invite
emails.
Merge pull request #1554 from getlantern/s3filename

Installer grabs configurl from filename