BooksDatabase.bookIdsByHash()
Merge branch 'master' into ice-cream-sandwich
Merge branch 'master' into beta
Merge branch 'beta' into beta-ics
Merge branch 'ice-cream-sandwich' into beta-ics
find dowloaded book by hash
Merge branch 'master' into ice-cream-sandwich

Conflicts:
	src/org/geometerplus/android/fbreader/network/NetworkBookInfoActivity.java
	src/org/geometerplus/android/fbreader/network/action/NetworkBookActions.java
Merge branch 'master' into beta
Merge branch 'ice-cream-sandwich' into beta-ics
Merge branch 'beta' into beta-ics