Recommended update for release-notes-openSUSE

This update for release-notes-openSUSE fixes the following issues:

- Updated Leap 42.1 release notes.(boo#1014257)
- Updated translations.
- Added warning to section about Btrfs disk space leak.(boo#1010575)
- Added reference to update and installtion chapter in documentation.

Fixed bugs
bnc#1010575
[doc] - the suggestion would just delete all files in my root
bnc#1014257
Leap 42.1 release notes -- update wanted
Selected Binaries
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