Merge pull request #25 from wick-ed/master

added basic documentation
Refactor session handling
Merge branch 'techdivision'
Make PSR-2 compatible
Merge pull request #26 from wagnert/master

Refactor session handling
Refactoring session handling + minor bugfixes
Merge branch 'techdivision'
Merge pull request #27 from wagnert/master

Refactoring session handling + minor bugfixes
Refactoring and documentation tasks
Make PSR-3 compatible
Merge branch 'techdivision'
Merge pull request #28 from wagnert/master

Refactoring and documentation tasks
Add new setter for session parameters
Merge branch 'techdivision'
Merge pull request #29 from wagnert/master

Add new setter for session parameters
Use servlet path + path info for security validation
Merge branch 'techdivision'
Add synchronization between session factory and manager
Add functionality to persist session data serialized
Add possibility to specify session configuration in web.xml file