reimplemented accepting extension EULA

- fixed displaying EULA translations (bnc#880504)
- fixed inconsistent layout (bnc#878976)
- keep the downloaded translations, do not store them to disk
changes

- 3.1.61
log not matching license files
use rspec 2.14.x at travis
Merge pull request #89 from yast/extension_eula

Reimplemented accepting EULA