Fixing flowgraph dump to clean it up (via patch from eb). Also added note about mutex locking in prune_tags.
Moved prune tags to gr_buffer.
Changing blocks to use new get_tags api and tag convinience functions.
Changing get_tags API to take in a vector reference instead of returning a vector.
Makefile changes to work in tag info stuff.
Adding information and convinience functions for accessing tag information.
Adding a burst tagger that creates a tag when a signal is observed on line 1.
Fixed tagging sink.
New file sink to handle tagged bursts of data.
Adding QA test for testing rate changes.
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