Build files not in build-tools

[skulptur]

https://github.com/mediamonks/muban/blob/master/src/app/bootstrap.dev.ts
https://github.com/mediamonks/muban/blob/master/src/app/bootstrap.dist.ts
https://github.com/mediamonks/muban/blob/master/src/app/partials.js
https://github.com/mediamonks/muban/blob/master/src/app/polyfills.js

[ThaNarie]

Those are not build files; they are the start, or become part of the bundle, so they are source to me.