Started with the possibility to connect components; Corrected some bugs; Added some details; Repositories

Topical Kieker-jar uploaded; Relative paths for libs; Plugins can now we added to a project and are shown on the screen.

Added the files for JointJS; Made sure that the available plugins will be shown; Made sure that messages can be shown

Added an overview diagram; Added configuration files for findbugs, checkstyle and pmd; Added maven-plugins to support these quality-tools; Moved some code; Modified some code for checkstyle; Added the kieker-header within the files.

Added comments; Imported the clean-up and formatter from Kieker; Modified the structure of a project.