Merge pull request #9 from laurentvdl/master

use Alfresco ReadWrite lock
Preliminary solution for issue #10.
Revert "create proxy for TemplateProcessorRegistry so we can use reset() using Alfresco ReadWrite lock #8"

This reverts commit b059631eff15d35adfcde38ab7da255c25bdd3dc.
sync both reset (read op) and addStore (write op)