Update py-flask-admin to 1.0.5.

1.0.5
* SQLAlchemy 0.8 support
* Choices and PostgreSQL Enum field type support
* Flask-BabelEx will be used to localize administrative interface
* Simple text file editor
* File admin has additional hooks: rename, edit, upload, etc
* Simple text file editor
* External links in menu
* Column descriptions
* Possibility to override master template
* Reworked templates. New 稷ayout� sample with completely different
  administrative UI
* Ability to customize wtforms widget rendering through form_widget_args
  property
* German translation (WIP)
* Updated documentation
* Lots of bug fixes

(kleink)