Revert "scrollStart in _wheel and snap fired on scrollEnd"

This reverts commit ea2c68076e00dd12c5d631b357629d54736c1888.
Revert "multiple indicators from @freestlr"

This reverts commit 3c7bb5ec70cb7af29cd298f6b855848869138d21.
Revert "Fix #425"

This reverts commit 411c24d034b03972260ff38af7d1e4ac25d35105.