omit libusb-1.0 prefix

automatically configured by CMake
Modified SICK TIM551 parser to accept reduced scanning range and to read out and publish intensity data. Also fixes breaking when a device name has been set.
Replace hacky bare socket handling with proper boost::asio socket handling in sick_tim3xx_common_tcp.cpp. Introduces dependency on boost::asio 1.46
Fully functional and tested on tim551.