shiro - Javadoc cleanup
Change package methods to private - where possible

And some minor javadoc cleanup.
Abort 1.7.2 Release (Updated release notes)

* Due to javadoc issues, release 1.7.2 aborted.  Central has hard rule
that javadocs must be created.
* Flagged failure on following
** Spring 2/3/4 and tomcat 5/6/7/8 where only one worked due to
duplicate classes
** Shiro having bad javadocs.
* Corrected Shiro immediately.  Remaining require a refactoring.
Merge pull request #179 from hazendaz/master

Aborted 1.7.2 Release - Cleanup starting