new API method: getResourceString
new API method: getResourceString

Conflicts:
	src/org/geometerplus/android/fbreader/api/ApiMethods.java
	src/org/geometerplus/android/fbreader/api/ApiServerImplementation.java
Merge branch 'master' into beta

Conflicts:
	src/org/geometerplus/android/fbreader/api/ApiMethods.java
	src/org/geometerplus/android/fbreader/api/ApiServerImplementation.java