addition of jigsaw app with a few levels
Add fourth level
add pagination to admin/gallery page
Automatically built.
Merge branch 'jigsaw' into finished

Conflicts:
	lib/tasks/seed.rake
Merge pull request #451 from code-dot-org/gallery-again-again

add pagination to admin/gallery page
Merge pull request #454 from code-dot-org/finished

dtd