New icon.

Credit: http://en.wikipedia.org/wiki/File:US_Navy_061026-N-7981E-019_Lt._Cmdr._Paul_Treadway,_Industrial_Hygiene_Officer_and_Assistant_Safety_Officer_of_the_Nimitz-class_aircraft_carrier_USS_Abraham_Lincoln_(CVN_72),_uses_a_sound_level_meter_to_demonstrate_the_high_deci.jpg
Added tag 2.1 for changeset 56af50356ea3