Merge pull request #1 from computc/master

Pulling upstream Start World Code into my branch
Merge pull request #2 from computc/master

Merging
Merge pull request #3 from computc/master

Mergin' upstream
Clipping for all not in current tiledroom
Fixed.
Merge branch 'computc-master'
Merge pull request #14 from fpruitt/master

Adding clipping for offscreen elements, fixes #10