DI_SETSVPERCENT decodes data as percentage.
DI_SETSV decodes data as dB.
Round instead of truncate.
Created SETSV script to test dB calculation.
Broke out common generator code into an include file.

--HG--
rename : sample_data/generate_soundweb_commands.rb => sample_data/soundweb.rb
Moved packet generator scripts to their own directory.

--HG--
rename : sample_data/generate_setsv_db.rb => sample_data/scripts/generate_setsv_db_level.rb
rename : sample_data/generate_soundweb_commands.rb => sample_data/scripts/generate_soundweb_commands.rb
rename : sample_data/soundweb.rb => sample_data/scripts/soundweb.rb
rename : sample_data/setsv_db_data.pcapng => sample_data/setsv_db_level.pcapng
rename : sample_data/sample_data.pcapng => sample_data/soundweb_commands.pcapng
Created SETSVPERCENT script to test percentage calculation.
Round percentage to two decimal places.
Changed data field to display as signed int32, decimal.
DI_SUBSCRIBESV and DI_SUBSCRIBESVPERCENT display refresh rate.

--HG--
extra : amend_source : 0dedb8b974e1cebe575a32db4c3fad0822f32924
Added capture from BSS DI message tool.
Refactored data field to match DI message tool output for each command.