Fix issue where tap was fired when touching and moving to a point and back to the origin. To fix it measure the deltaX and deltaY and only tap if deltaX and deltaY are smaller then 30.
Merge pull request #561 from tobibo/master

Fix issue in touch. When moving to a point and back to origin tap got fired.
Merge branch 'master' into ie10

Conflicts:
	src/touch.js
	test/touch.html