v3.0.1: Bring changes from current Pharo 9.0

Change log:

• Minor changes in Hiedra-Tests package

v3.0.0: Split test of examples in two classes

Change log:

• Optimize space usage: as screenshot shows, text can now follow the hiedra cells (before, there was only a global hiedra width that the column show adjust to, and the text had to go in a different column). (See screenshot).
• Colors! Add branch color mapping.
• Improve Spec2 example with an action bar that helps user to play with rendering parameters.
• Examples have their own package.
• Test examples.

v2.0.0

Change log:

• Add support for FastTable, and it's optimized for it (keep support for Spec's TreePresenter, but it may be slower there).
• Better tests: more coverage and more understandable code.
• Add examples of use in both FastTable and Spec.
• Improved comments in methods and classes.
• More understandable code.

This is the version integrated in Pharo 8.0 via this PR: pharo-project/pharo#2926

Migration from smalltalkhub

The code was stored at http://smalltalkhub.com/#!/~MartinDias/Epicea together with another project.