GenericEditors now check their "selected" status before asking to be deleted.

The FilterViewport pauses for 50 ms after deleting a processor in order to
avoid double-deletions.

This reverts commit 307a5c3d.

Made UIComponent a MenuBarModel

Previously, if you placed a sink in front of a source, it would lead to
a never-ending "while" loop. By removing two lines (254-255), this problem
was solved.

In combination with an EventNode, a WiFiOutput node is able to send a
simple message to a hard-coded address via UDP. This is the first sink that
actually emits an output. It's obviously over-simplified, but as a
proof-of-concept, it seems to be working well.

Added a header-file and a cpp file from
http://cs.baylor.edu/~donahoo/practical/CSockets/practical/

Methods from these classes are currently being used to control the output
of the WiFiOutput class.