Merge pull request #56 from olab-io/develop

Develop
Merge pull request #57 from olab-io/develop

Update docs.
Merge branch 'develop'
Merge branch 'develop' of github.com:olab-io/ofSketch into develop
Merge branch 'develop' of github.com:olab-io/ofSketch into develop
Fix: https://github.com/olab-io/ofSketch/issues/40 & added default column marker: https://github.com/olab-io/ofSketch/issues/41