Ignore <template> when setting index
Merge pull request #168 from ghjunior/index-ignore-template

Ignore <template> when setting index
#166: + stopPropagation in _onDragOver
Merge branch 'dev' of github.com:RubaXa/Sortable into dev
Fix documentation for onAdd event .from
#171: + preventDefault
Merge branch 'dev' of github.com:RubaXa/Sortable into dev
#172: + _cloneHide
* upd 'dev'