(no need to sudo on mac)
People using the git repository directory might have to install PyYAML now, since aliBuild does not use it's own copy to guarantee compatibility with python 3.
New features & bug fixes:
- Python 3.x support: you can now use aliBuild with python 3.
- Improved supports for defaults. You can now use defaults to change all of the recipe metadata, for example the version of a given tool. This is detailed in http://alisw.github.io/alibuild/user.html#defaults. Most notably, alice users can use `--defaults root6` to use ROOT6 or `--defaults o2-daq` to have a minimal configuration when compiling AliceO2.
- Improved `aliDoctor`: now behaves exactly like aliBuild and supports the `--defaults`, `--docker` and `--disable` option.
- Improved docker support: major bug fixes and the ability to specify your own image via the newly introduced `--docker-image` option.
- Improved support for multiple development areas. aliBuild clean should now be consistent when cleaning up things.