An application dock applet for the MATE panel.

The applet allows you to:
* Place a dock on any MATE panel, of any size, on any side of the desktop you desire.
* Pin and unpin apps to the dock.
* Rearrange application icons on the dock.
* Launch apps by clicking on their icons in the dock.
* Minimize/unminimize running app windows by clicking the applications dock icon.
* Detect changes in the current icon theme and update the dock accordingly.
* Use an indicator by each app to show when it is running.
* Optionally, use multiple indicators for each window an app has open.
* Use either a light or dark indicator that it can always be seen no matter what colour the panel is.