devel: Switch from Java to C++

- Removed previous Java files
- Deactivated usage of Travis CI
- Updated .gitignore to the new project structure and usage of the Qt
Creator
- Created dummy files for the CLI and GUI
- Added CMake module to find GNU readline
- Configurated CMake (library and CLI) as well as QMake (GUI)
- Added an interface for Optimisationproblems to the library
- Updated License information (some line breaks and added 2014 to the
year)

Signed-off-by: Sebastian Niemann <niemann@sra.uni-hannover.de>