* callbacks for set average on fft, waterfall, number sinks
* add units to params: Sps, Hz, dB...
* add bool type to command line option store_true or store_false
+* messages for packet blocks and probe blocks
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# Features
* concept of a project, or project flow graph
* collection of blocks, hier and top
* system-wide, default/work, and user created
+* use templates/macros to generate the repetative stuff in the xml
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# Problems
* threads dont die on exit in probe and variable sink
* align param titles in properties dialog
* weird grid params misbehaving
+* gr hier blocks have more diverse IO capabilities than we allow for
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# Future