models/user: better directory handling when change username

Previously, if the user base directory somehow doesn't exist, the
application throws 500 for failure of rename.

Now it detects if the application should rename or just create a
new directory.

Bump version

Prepare release

Prepare release

Update locales

Prepare for release

Update .gopmfile and glide.lock

Update locales

Update glide.lock and .gopmfile [CI SKIP]

Update locales [CI SKIP]