adding abstract, which was reviewed by WJ
adding abstract, which was reviewed by WJ
kaathleen/LeapGesture-library,kaathleen/LeapGesture-library,kaathleen/LeapGesture-library,kaathleen/LeapGesture-library,kaathleen/LeapGesture-library,kaathleen/LeapGesture-library,kaathleen/LeapGesture-library