Merge pull request #22 from makinacorpus/stable

Stable
Merge pull request #23 from makinacorpus/stable

Stable
Merge remote-tracking branch 'origin/stable'
Merge pull request #24 from makinacorpus/stable

fix rpn
Merge pull request #25 from makinacorpus/stable

Stable
Merge pull request #26 from makinacorpus/master

Stable