Perhaps decouple the JS framework from the MAS builds to be a bit more agile. You could set up a CDN with all of your builds on it: 

* http://phosphorecdn.com/phosphore-1.0.2.js
* http://phosphorecdn.com/phosphore-1.0.2.min.js

You could introduce a bit of indirection since the framework output is versioned: 

* http://phosphorecdn.com/phosphore-1.0.stable.js
* http://phosphorecdn.com/phosphore-1.0.stable.min.js
* http://phosphorecdn.com/phosphore-1.0.dev.js
* http://phosphorecdn.com/phosphore-1.0.dev.min.js

etc.