uhd: fixing uhd apps to take a subdev spec; also changing to more general uhd parameter of 'args' instead of 'address' which defaults to the first uhd dev found.
tags: made tags object oriented
grc: added throttle tag to blocks that throttle
usrp: updated installed examples
Merge branch 'next' of http://gnuradio.org/git/gnuradio into next
examples: removed multi-antenna examples.
cmake: fix that component depends on component hack
uhd: fixed examples to use new find_devices command.
uhd: fixed swig file to make guile build happy.
uhd: added uhd.find_devices to python
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