[udesk/dante] Fix typo.
[udesk/*] Major code revision, fix a number of bugs, add window and event objects.

This commit introduces the initial window and event objects implementation, as well
as introducing many improvements:

* improve makefiles
* fix a number of issues with memory management
* initial event propagation implementation
* introduce object reference counting
* implement more udesk features
* fix some udesk identifiers
* minor improvements