Parser refactor

[norberttak]

Refactor the configuration parser to use a recursive descent type parser instead of regexp based.

• [x] support array type datarefs
• [x] fix unit test errors
• [x] add cmake
• [x] add extra checks for key-value pairs (stoi, stood, ...)
• [x] update documentation with changes in config syntax
• [x] prepare the change log for release notes

closes #6

[MrAnno]

1400 lines 😮. I hope you don't hate me too much for suggesting a recursive descent parser. 😄

[norberttak]

1400 lines 😮. I hope you don't hate me too much for suggesting a recursive descent parser. 😄

No, I really enjoyed it. Actually, this project is all about making code lines. So the more code lines the more fun for me :-)