Merge pull request #30 from windauer/development

* fixed Tomcat 8 (getRealPath()) issues
* not sure if that's already sufficient as the implementation still just uses getRealPath - will do some further testing after merge
* renamed getBfRealPath to getRealPath;
* nowing using getRealPath in all locations where files are resolved
* added javadoc
* changed implementation of getRealPath to be a bit more portable. However still does not work with packed war files
just a version info
- Iteration 4 to fix path handling in ServletContainers