java 8 fix

fix #108: settings InstanceID prevents Samsung TV from throwing 500 I…

…nternal Server Error

#99 - check update policy back to always

fixes #106 - icon with number of visible upnp devices

remove unused dependencies

update maven deps to fresh versions

fixes #98: switched cling to use apache's httpclient - that should fi…

…x problems with the classloading

fixes #97: requery config in case of changed local player

fix wrong url passed to upnp player

fix maven - add upnp repo