Revert "just for safety here"

This reverts commit 5bba7492d64a9bbbbc70f412add780df9fba49ad.
Revert "going multiuser"

This reverts commit 007a5bcc931a281886d602f228cda7d15dbe7179.
extended hammer structure
added drag svg example
documentation, belongsTo() and whichTouchOf()
make detection.js multi-user
make event.js trigger multiple (user-specific) events
generated stuff