Can be used to inspect the state of the objects in
a running KOReader.
It can also be used to execute actions (like the ones
available to associate to a gesture) with HTTP requests
from a remote computer/devices/gadgets.
The TCP server side is provided either with a new
ZeroMQ StreamMessageQueueServer (thanks bneo99),
or with a LuaSocket based SimpleTCPServer.
Minor UIManager tweak to avoid uneeded inputevent
when such a ZeroMQ module is running.
