PrimaryFeather/Sparrow-Framework — pull request #1061 by tconkling (2012-04-17 21:09:37+00:00)
Title: add SPTouch.touchId

Each SPTouch has a unique ID that remains consistent through all touch phases,
which makes it much easier to keep track of multiple simultaneous touches

(I went with "touchId" instead of "id" because of id's status as a reserved keyword in ObjC)