Log Message:
xfce4-weather-plugin: update to 0.9.0:

- Port to GTK+ 3
  - Preferences dialog ported to Glade
  - Replaced individual header includes
  - Replaced deprecated symbols
  - Replaced direct access with accessor functions
  - Improved forecast background with dark and light themes
  - Improved spacing in the preference and forecast dialogs
  - Added small (3px) padding between weather icon and scrollbox
  - Fixed full debug builds
- Port to libsoup 2.42
- Updated build requirements:
  - gtk+-3.0 3.22.0+
  - gthread-2.0 2.42.0+
  - glib-2.0 2.42.0+
  - libxfce4util-1.0 4.12.0+
  - libxfce4ui-2 4.12.0+
  - libxfce4panel-2.0 4.12.0+
  - libsoup-2.4 2.42.0+
- Use HTTPS where possible
- Translations updates