Text bounds fix and additional options for Baseline

[JoachimM7]

No description provided.

[ystrot]

Thank you a lot for your work! It would be better to split pull requests by task. There are three different tasks in this request:

• Fix of Text bounds not supporting font weight #241. This one is good, with a pull request I can quickly check and apply it.
• Documentation. It's a good start, but it will require some iteration to describe all necessary parts, so it will be good to keep progress in one independent pull request.
• Model changes, i.e. perfectTop/perfectMid/... This one is tricky, I'll provide you more details in the corresponding ticket Remove some (often useless) space when drawing Text #242.

[JoachimM7]

Ok. I will create two new pull requests, one for fix #241 and for the Documentation I will create a new branch and there I can add my DocStrings step by step (but this needs time, I still do not understand everything in Macaw, luckily the code is very vell readable!)