[API] moved PicoContainer and WEUPnP libraries to Saros Core

Change-Id: I5d4cf78ca798f465d62c732f85d8fdb292b662fd
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1363
Tested-by: Jenkins CI
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>