Change maximum latency to ~100 ms. Report consumed samples for correct channel.
Replace Clock Recovery MM with Polyphase Clock Sync in no-GUI receiver.
Get rid of deduplication.

The duplicates were occurring due to a bug in the packetizer, which has
already been fixed.
Add partial parsing for the third type of broadcast packets.
Update hierarchical block to use polyphase clock sync.
Change 6-channel receiver to use polyphase clock sync.
Eliminate unnecessary blocks in no-GUI receiver.
Remove obsolete aliasing receiver.
Put hierarchical block in Elster category, and categorize names.
Update README to reflect recent changes.
Merge branch 'master' into foxhunt
Update direction-finding flowgraph to match updates to the others.