0.7.0

Features

• Publish a maintenance web page during migration. The host and port are
  configurable with new options. By default the port match odoo's (8069). A
  default maintenance is provided, but it can be configured as well.
• When a migration fails, the log alongside the traceback are logged in the
  marabunta_version table.

Bugfixes

• Commands with unicode chars make the migration fail

Build

• Removed python3 from tox, it doesn't run on py3 and we can't make them run
  now. Odoo is still python2, py3 compat will come when it'll switch.