Fixed Issue #40 where a reverse associations sometimes was not found
Merge pull request #41 from hbaragar/master

Fixed Issue #40 where a reverse associations sometimes was not found
input-many: fix "label for= attributes are not updated" issue.
sortable-input-many: fix "+/- buttons are not updated on reorder" and "id's and name's are not updated on reorder" issue.
input-many:  remove duplicated code.