Update beacon_manager.rb

remove unnecessary code
Update beacon_manager.rb

optimise beacon filtering code
Update beacon_manager.rb

rollback changes that needs to be written as is
Update beacon_manager.rb

allow to choose range method
Update beacon_manager.rb

fix bug on calling range method
use different comparison for accuracy range check
add debug message for ranging
extended debug message for beacon found
only reverse found beacon sequence if use rss
Merge pull request #4 from goodwill/master

add accuracy based support for beacon_manager