menu data structure refactoring
Merge branch 'beta' into beta-ics

Conflicts:
	src/org/geometerplus/android/fbreader/FBReader.java
	src/org/geometerplus/android/fbreader/MenuItemData.java
fixed icon
Merge branch 'beta' into beta-ics
menu data refactoring
Merge branch 'beta' into beta-ics

Conflicts:
	src/org/geometerplus/android/fbreader/FBReader.java
fixed MenuData.getRoot()