Merge pull request #14 from Keuronde/master

Add french translation
French translation
- new page for multiline text
- new settings for history
- new setting for scan on start
- cover action
- settings page with SlideshowView
- scan on start
- first coding for history page
new version 0.7.0 / release candidate 1
new version 0.7.0 / release candidate 2
- bug fix: lock device immediately after app startup
- timeout is a constant
- little improvement on settings page
update of Swedish translation