fixed 'Book is being downloaded' button behaviour
Merge branch 'master' into ice-cream-sandwich
Merge branch 'master' into beta

Conflicts:
	src/org/geometerplus/zlibrary/core/network/ZLNetworkManager.java
Merge branch 'beta' into beta-ics
Merge branch 'ice-cream-sandwich' into beta-ics
separate icon fo 'downloading' status
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