* Includes the latest extensions.
* Add a cleaner way to generate the per-version extensions.
* Make it possible to add other extensions as for the Semantic Bundle.
* Make diff creation a little smaller by excluding whitespace differences.

Bug: 43815
Change-Id: I1173b381b4d48f28071c28204431f265406de751
Merge "* Includes the latest extensions. * Add a cleaner way to generate the per-version extensions. * Make it possible to add other extensions as for the Semantic Bundle. * Make diff creation a little smaller by excluding whitespace differences."