open book from bookmarks view
Merge branch 'master' into multidirs
Merge branch 'multidirs' into beta

Conflicts:
	src/org/geometerplus/android/fbreader/BookmarksActivity.java
	src/org/geometerplus/fbreader/fbreader/FBReaderApp.java
use standard book key for selected book in library
Merge branch 'master' into multidirs
Merge branch 'multidirs' into beta