µBlock 0.8.1.2

No change from previous version.

I was forced to bump up the version number due to:

1. Me wanting to submit a new version of uMatrix: 0.8.1.1
2. Being warned by the Chrome store that the description for the pt_PT version was too long
3. Me closing Google Chrome and booting Chromium to address the issue
4. Me fixing as best as I can the too long description and re-packaging uMatrix
5. Me closing Chromium and launching Google Chrome again to re-submit the fixed version (Chromium crashes when opening the Chrome store..)
6. Me realizing that for whatever reason, there is a pending published version of uMatrix as a replacement of uBlock
7. Read carefully: I never ever clicked "Submit" at any time in all this
8. Me panicking, as users of uBlock are about to end up with uMatrix instead
9. Me panicking
10. Me find the unpublish button for uBlock to prevent uMatrix being installed as an update of uBlock
11. It worked, but now there is no longer a uBlock extension in the Chrome store
12. Me resubmitting the new package of uBlock
13. Store refusing, demanding a newer version number
14. Me bumping version number of uBlock to 0.8.1.2 to make Chrome store stop complaining
15. Finally submit works, had to fill in descriptions in all languages all over again, icons, screenshots, etc.
16. Finally it's back in the store, as version 0.8.1.2, all else is same as version 0.7.2.1