Clean up the complete build directory. This ensures that no deleted header file will be used.
Added dependency on libsdsl.a file
Merge branch 'compile_fixes' into installation_process
Added a test that simply includes all header files.
For this, a header file which includes all header files is created on installation automatically.
The test should discover compile errors, especially on header file that are not yet tested, see e.g. commit 52f85a3e4e.
File that contains all header is now a lokal test-header file
Merge pull request #54 from simongog/test_improvements

Test improvements