moved host code into host directory for clean (unambiguous) top level
Added control code in the txrx.c and dboard interface for usrp2 to handle gpio and atr
Added usrp2 impl for the guts of the usrp2 handling.The top level usrp2 will contain an impl and forward calls to it.
Removed Autotools stuff and the git ignore files.Feeding cpack a readme and license file.Added readme contents.
Added CMakeLists.txt for the include dir.Setting up the pkg config file through cmake.Added stuff to cmake to add optional flags.
Made use of templated dict to replace used of mapand to get rid of utility call.
renamed usrp_uhd to uhd
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