Merge pull request #44 from aschnell/master

- work on testability
Merge pull request #45 from aschnell/master

- fixed btrfs subvolume detection (bnc#869764)
Merge pull request #46 from aschnell/master

- increased version
Merge pull request #47 from aschnell/master

- fixed type visibility for gcc 4.9
Merge pull request #48 from aschnell/master

- added convenience function
Merge pull request #49 from aschnell/master

- fixed compilation depending on defines
Merge pull request #50 from aschnell/master

- cleanup
Merge pull request #51 from aschnell/master

- added testcase
Merge pull request #52 from aschnell/master

- updated documentation
Always wipe PReP partition

grub2-install is able install stage1 binary only to either empty partition or
partition with stage1's ELF.

Make sure we're wiping PReP partition all the time.

Signed-off-by: Dinar Valeev <dvaleev@suse.com>
Merge pull request #53 from k0da/master

Always wipe PReP partition