added Gumby extension library
settings updated with variables extending use of Modular Scale 2.x, with commentary for appropriate use
updated settings with optional variables for use with Modular Scale 2.x, with comments instructing proper use
updated concat & build task
added gumby-comment extension
Merge branch 'master' of https://github.com/isologic/ghostby

Update README.md which was edited with Prose.io