revert unnecessary customizations of Blob.js & FileSaver.js

Per https://github.com/eligrey/Blob.js/pull/20
& https://github.com/eligrey/FileSaver.js/pull/63
The library author has deemed the existing /*! @source URL */ comments to be
sufficient attribution, and these already survive minification.

Refs ea591748

docs/assets/js/blob.js

-/*!
- * Blob.js
+/* Blob.js
  * A Blob implementation.
  * 2013-12-27
  * 

docs/assets/js/filesaver.js

-/*!
- * FileSaver.js
+/* FileSaver.js
  * A saveAs() FileSaver implementation.
  * 2013-12-27
  *