- Also removes all references to boost/cstdint.hpp and replaces it with
stdint.h (The 'correct' replacement would be <cstdint>, but not all of our
compilers support that).
the device address gives a key, value pair of infinite optional capabilities
added a cast option to the device address to cast string to type T
added call to the zero_copy_if to get send and recv frame sizes
changed the usrp2 impl to calculate recv/send spp from the data transport