Fix description for 'marker-interface' and 'annotation' in mybatis-spring.xsd

Fixes gh-283

Author: kazuki43zoo

src/main/java/org/mybatis/spring/config/mybatis-spring.xsd

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-       Copyright 2010-2017 the original author or authors.
+       Copyright 2010-2018 the original author or authors.
 
        Licensed under the Apache License, Version 2.0 (the "License");
        you may not use this file except in compliance with the License.
@@ -47,7 +47,7 @@
         <xsd:annotation>
           <xsd:documentation>
             <![CDATA[
-              The scanner will register all interfaces in the base package that also have the specified annotation.
+              The scanner will register all interfaces in the base package that also have the specified interface class as a parent.
             ]]>
           </xsd:documentation>
           <xsd:appinfo>
@@ -61,7 +61,7 @@
         <xsd:annotation>
           <xsd:documentation>
             <![CDATA[
-              The scanner will register all interfaces in the base package that also have the specified interface class as a parent.
+              The scanner will register all interfaces in the base package that also have the specified annotation.
             ]]>
           </xsd:documentation>
           <xsd:appinfo>