add mqtt
add mqtt and its dependencies into the main pom
add a mqtt-config example bundle

initializes a linker and the importer for an mqtt service (based on rabbit)
add mqtt distribution compilation profile
add pom for mqtt module
add protocol pubsubhubbub

add subscriber(the fuchsia importer) and hub
add pubsubhubbub configuration example

add a configuration to instantiate required components so pubsubhubbub can be up and running
add distribution compilation profile for pubsubhubbub
workaround to rome bug

due to a bug in rome, it was not able to be loaded into OSGi framework (using a bundle resource with a bad context). This commit uses a workaround, and avoid the use of the custom compiled version 1.00325