First draft of test chapter.
Some heading changes
Finished test cases.
Added RESTful considerations.
First full draft of session management chapter
Merge branch 'session' of https://github.com/lukos/DevGuide into session
Merge remote-tracking branch 'owasp/master'
Merge branch 'master' into session
Merge pull request #22 from lukos/session

Update session management text during the hack-a-thon.