Consolidate SWF security tags with SEC taglibs

Before this change, SWF had its own faclets security tag library with
hierarchy root in AbstractAuthorizeTag.

As of this change SWF facelets security tag library inherits Spring SEC
AbstractAuthorizeTag instead, consolidating the two frameworks making
it easier to maintain, extend and reuse. This is made possible by
adding Spring security taglibs module as optional SWF facelets
dependecy. Because the dependency is optional, existing SWF facelets
security tag library users will have to explicitly add Spring Security
taglibs module as dependency.

Issue: SWF-1557
Merge pull request #25 from sslavic/SWF-1557