Added DLLs to compile with KSP 1.1: KSPUtil and UnityEngine.UI

Author: bld

Makefile

@@ -25,8 +25,8 @@ build: build/PersistentThrust.dll
 
 build/%.dll: ${SRCFILES}
 	mkdir -p build
-	${GMCS} -t:library -lib:"${MANAGED}" -lib:"${MECHJEB}" \
-		-r:Assembly-CSharp,Assembly-CSharp-firstpass,UnityEngine \
+	${GMCS} -t:library -lib:"${MANAGED}" \
+		-r:Assembly-CSharp,Assembly-CSharp-firstpass,UnityEngine,KSPUtil,UnityEngine.UI \
 		-out:$@ \
 		${SRCFILES}