web/Airy.js:Airy: Consolidated the comments describing variables and added a description for Airy.
web/Airy.js:Airy: Added the gesture IDs for three-finger gestures.
web/Airy.js:Airy: Added a comment describing "function Airy(pOnGesture)".
web/Airy.js:Airy: Revised "Airy.prototype.getTouchEventType" and added a comment describing it.
web/Airy.js:Airy: Revised "Airy.prototype.getGestureId" and added a comment describing it.
web/Airy.js:Airy: Revised "Airy.prototype.onTouch" and added a comment describing it.
web/Airy.js:Airy: Added a comment describing "Airy.prototype.attachTo".
web/Airy.js:Pointer: Fixed a bug.