CAS-1371: Fixed a bug where requiring to create sessions at the JSP layer gums up the next login attempt from that browser session within the servlet session duration.
CAS-1332: Making the logger instance available to extensions.
CAS-1334: Adjusted ArgumentExtractor's javadoc to match interface behavior.
NOJIRA: Update X509's Ehcache dependency version to match parent.

Updated and fixed test failures as well.
CAS-1371: Fixed a bug where requiring to create sessions at the JSP layer gums up the next login attempt from that browser session within the servlet session duration.  This can be reproduced via:

1) log in to an application via CAS.
2) Log out from application, terminating application-local session and redirecting to cas/logout .  This terminates previous and issues new servlet session with corresponding JSESSIONID cookie.
3) without closing browser, try to log in to the application again via CAS.  This deposits you to the CAS login form, of course.
4) correctly complete and submit the CAS login form, but be rejected! CAS redirects back to and displays login form again, issuing a new JSESSIONID.
5) correctly complete and submit the CAS login form.
Merge branch 'CAS-1371' of github.com:Unicon/cas into CAS-1371
CAS-1374: Removed the SamlDateUtils class, and moved the functionality to cas-core
CAS-1375: Upgrade aspectj (and its maven plugin)
CAS-1367: Update exclusion rules for the maven licensing plugin
CAS-1367: Update exclusion rules for the maven licensing plugin
CAS-1378: Make 1.0 validation use attribute setting in service registry.
CAS-1374: Switched over to FastDateFormat
CAS-1374: Added pom dependency for the FastDateFormat reference
CAS-1376: Added missing license header and mapping to ldap schema file
Add test for CAS-1378
CAS-1376: Added missing license header and mappings.
CAS-1374: Fixed pom dependency for the FastDateFormat reference
CAS-1374: Fixed pom dependency for the FastDateFormat reference
 - added reference implementation section 1.2

- added URI overview table
- minor fixes
- prepare for pandoc TOC support
- Updated README.md
 - avoid build failure due to missing license header in generated spec html file using pandoc template.
 - fixed line lengths in PDF files (GitHub markdown linebreak behavior differs from all other MarkDown flavors)
 - removed escape chars.