Added clean mosquitto v1.3.4 to XIA applications.

Added clean version of mosquitto v1.3.4 to XIA applications folder (i.e.
'out-of-the-box', as retrieved from mosquitto's website
http://mosquitto.org/download/).
From this clean point, will include alterations to mosquitto v1.3.4 to
make it work over XIA, in the fashion of P/S Design I (using HID
and SID principal types).