added sphere function
Merge remote-tracking branch 'remotes/upstream/master'

Conflicts:
	createCube.py

Edit:
    Fixed misspelling of prism.
Merge remote-tracking branch 'remotes/upstream/master'

Conflicts:
	createCube.py

Edit:
    Fixed misspelling of prism.
Merge pull request #2 from AnnaKriegl/master

Hello! Checky thissy outy!