CASC-174 Provide facility for Servlet 3.0 programmatic JAAS login.

Servlet3AuthenticationFilter supersede the JBoss-specific
WebAuthenticationFilter for JBoss 7. It should also provide support for
programmatic JAAS login for any container that is Servlet 3.0/JEE6
compliant.
CASC-174 Remove JBoss verbiage from error message.
CASC-174 Remove @version javadoc tag.
use interface instead of implementation
updated memcached version
Merge pull request #56 from serac/CASC-174

CASC-174 Provide Programmatic JAAS Login Facility for JBoss 7
changed from provided to compile
Merge pull request #57 from h0nIg/memcachedclient

use memcached interface instead of implementation / updated client library
Remove cached assertions on logout to prevent credential replay attack.
Respond to code review feedback.

1. Call HttpServletRequest#logout() on SLO callback since it is available.
2. Use final for local variables where possible.
Put HttpServletRequest#logout() in separate try/catch block.
Merge pull request #58 from serac/jaas-logout-fix

Destroy cached assertions in CasLoginModule#logout() method
Updated pom.xml file to jasig-parent-36
Updated to Jasig Parent POM Version 37 and set up correct release version.
[maven-release-plugin] rollback the release of v3.3.0
Updated pom.xml to the latest jasig-parent pom (38)
Correct license header information.
Added missing license headers
Fixed license files
Fixed licensing / exclusions.