preview working, cf. issue #4
library backend working, missing only search for issue #3
bugfix for issue #6
bugfix resolving issue #7
fixing version number
library update on save/save, completing issue #2
search function working, closing issue #3
small bugfix concerning access to non-open database
bug #8 resolved, minor layout fixes
export font changed, some code restructuring
Merge branch 'v0.2'

Conflicts:
	recipeedit.hh
	ts/recipes_de.qm
	ts/recipes_de.ts