Cleaned up a lot of code; Modified the visual appearance of the GUI itself; Removed bugs; Added some localization strings; Updated the flow editor; replaced the checkstyle config file with the newer one from the Kieker project; Removed a lot of unnecessary comments to make the code easier to read

#685;Added guava to the project; Added another example; Solved a minor problem within the flow editor.

Removed some unnecessary code; Corrected some path bugs; Made sure that javadoc will be included within the source archive

Continued with the user management; Removed some unnecessary parts of Shiro; Continued with the template

Solved some security/redirecting issues with the root context; Corrected the login form; Corrected the link for the logout