Change DCel definition and use data() / set_data() to access faces information
untracked files on master: d1604a2 version 1.2.0
index on master: d1604a2 version 1.2.0
WIP on master: d1604a2 version 1.2.0
Merge commit 'c0174de5078598bddf0ac89fd27318b1a57b1fe8' into feature/task-SaveArrangementWithInfo
Close #31

Save arrangements with infos
Mini refactoring and bug fixes