Summary: Per discussion in parent diff, fixed the links to be idiomatic so that they work in both internal and public builds Reviewed By: jknoxville Differential Revision: D27963896 fbshipit-source-id: 35504b04e8975acc419be668804c5d7ad7aa2a16
Summary: Added migration guide from classic to Sandy plugins Reviewed By: passy Differential Revision: D27908674 fbshipit-source-id: d4b5a0b45e314226825375d762902041f90c04c8