* Uses OpenScenarioLib v1.3.1
* Adds patch for OpenScenarioLib to generate code model for generator
* Updated documentation (e.g. all links use correct URLs)
* Updated generator templates
  * namespace v1_1 -> v1_2
  * Logger instead of std::cout
  * Code improvements introduced through clang-tidy
  * Minor fixes
* Updated generated and existing (incl. tests)
* Make all tests run

Closes #19 #31