djvu plugin is temporary disabled
Merge branch 'master' into ice-cream-sandwich
Merge branch 'ice-cream-sandwich' into yota2

Conflicts:
	src/org/geometerplus/fbreader/formats/PluginCollection.java
external plugins disabled for API < 8
Merge branch 'master' into ice-cream-sandwich
Merge branch 'ice-cream-sandwich' into yota2
Merge branch 'yota2' into kindle