Add legacy and default resolvers

src/main/java/org/springframework/shell2/ParameterResolver.java

@@ -0,0 +1,16 @@
+package org.springframework.shell2;
+
+import java.util.List;
+
+import org.springframework.core.MethodParameter;
+
+/**
+ * Created by ericbottard on 27/11/15.
+ */
+public interface ParameterResolver {
+
+	boolean supports(MethodParameter parameter);
+
+	public Object resolve(MethodParameter methodParameter, List<String> words);
+
+}