Fixes #16: Make callbackURL optional and makes it default to document.location.href
3.2.0
Oops, fixing tests
3.2.1
Update README.md
Update package.json
3.2.2
Update to better JSON.parse fallback
Update API documentation for lib/base64_url_decode.js
Update API docs for assert_required
Move `Array.isArray` polyfill to function wrapper
Update LoginError API docs
Update use_jsonp API docs