With this version we removed the old parser of Pillar to introduce
PetitPillar base on PetitParser.
This parser is slower than the previous one but we will be able to
improve his speed.
We will also be able to improve Pillar at the parser level, which was
impossible before. So we will be able to remove some hacks and improve
the experience of the users.
If you are good in parser and you want to contribute to his improvement,
feel free to help, we have a lot of tests to help. This is my first
parser so I am sure it have a lot of rooms for improvement.