synchronization with beta branch
Merge branch 'master' into beta

Conflicts:
	src/org/geometerplus/android/fbreader/MenuData.java
	src/org/geometerplus/android/fbreader/api/ApiServerImplementation.java
node set implementation
Merge branch 'master' into beta

Conflicts:
	src/org/geometerplus/android/fbreader/MenuData.java
synchronization with beta branch
Merge branch 'master' into beta
subMenu => submenu
Merge branch 'master' into beta