v3.7.1

Bug Fixes:
#228 Fix typo in udp_interface
#231 MACRO_APPEND with multiple items not working
#235 Improve IntegerChooser and FloatChooser Validation
#236 TestRunner doesn't support status_bar
#240 Make sure super() is called in all bundled conversion classes
#241 Don't reformat BLOCK data types with a conversion in Structure#formatted

Migration Notes from COSMOS 3.6.x:

1. Background task arguments are now broken out instead of being received as a single array
2. udp_interface now takes an optional argument for bind_address
3. line_graph_script has been significantly updated to support modifying plots from the script.