[BUG #8112] Remove emulatetouch
* Removed occurences out of the following classes/files:
* application/demobrowser/source/class/demobrowser/demo/test/Touch.js
* application/feedreader/config.json
* component/skeleton/mobile/config.tmpl.json
* component/testrunner/testrunner.json
* component/tutorials/mobiletweets/step1/config.json
* documentation/manual/source/pages/mobile/mobile_overview.rst
* framework/source/class/qx/core/Environment.js
* framework/source/class/qx/event/handler/Touch.js
* framework/source/class/qx/test/core/Environment.js
* tool/grunt/task/package/dependency/test/data/qx/core/Environment.js