Summary:
Flipper cannot load Sandy plugins packaged by flipper-pkg, because the latter only expose default export, but Sandy API is using named exports instead ("Component" and "plugin").
This change fixes this by exposing both default and named exports from plugin package.
Reviewed By: passy
Differential Revision: D23815769
fbshipit-source-id: 1dd273b2e7b98bd01148506037066c41ffd19eb8