Update Polymer to 0.3.3
Add JSON v3.3.2.
Merge pull request #3437 from kitcambridge/json3@3.3.2

Add JSON v3.3.2 [author]
Update package.json for broken lib link

Realized we moved the library file but forgot to update the package. All is correct with npm now, adding the link back in here. Sorry about that!
Merge pull request #3436 from tomalec/master

Update Polymer to 0.3.3
Merge pull request #3438 from lmccart/patch-1

Update package.json for broken lib link