- removed warnings
- added flake8 as CI target

- test run again
- notebooks not yet

- single function to create kernel for specified target
- data type creation from string - reuse numpy functionality
- bugfixes in dot display

Fixed a severe bug. Renamed makePythonFunction of the llvm backend.
Deleted code duplicity.

Added LLVM: CodePrinter and a compiler
Updated data_types
Added tests
Added jupyter notebooks
Fixed bugs
Restructured transformation functions