logic for making a column 'release' has been modified. Any merge to master now makes the branche release.
develop column renamed from d to d0, d1, d2, ...
- create new columns for extra develop commits
- combine them as normal
- refactored sorting of columns
- new green arrow type for develop commits
Merge branch 'feature/multiple_develop_columns' into develop
Merge remote-tracking branch 'origin/develop' into feature/progressive_load