Adding new marshmallow-house directory

Please review this, @casey-collab

- Have finally fixed the relative path so it works!

I am so sorry, I am still bit confused with .git and GitHub.
- Forked and Cloned the create-your.. repository
- created change-story branch on local master and made it the current directory
- created marshmallow-house directory with directories and files in it
- added and committed the changes from change-story branch
- pushed the branch to origin
- found error on marshmallow-hous/marshy-house.md - followed the above two steps
- hopefully I am now not wasting your time.