Added documentation on migrating from 1.0.x to 1.1.x

fixes #350

docs/src/main/asciidoc/migrations.adoc

@@ -6,7 +6,108 @@ In the following document we will write about necessary migration steps between
 
 === 1.0.x -> 1.1.x
 
-TODO: https://github.com/spring-cloud/spring-cloud-contract/issues/350
+==== New structure of generated stubs
+
+In `1.1.x` we have introduced a changed structure of generated stubs. So if you've
+been using the following `@AutoConfigureWireMock` notation to use the stubs from classpath
+
+[source,java]
+----
+@AutoConfigureWireMock(stubs = "classpath:/customer-stubs/mappings", port = 8084)
+----
+
+It will no longer work with the new stubs. You have to either change the location of stubs
+to : `classpath:.../META-INF/groupId/artifactId/version/mappings` as follows
+
+[source,java]
+----
+@AutoConfigureWireMock(stubs = "classpath:customer-stubs/META-INF/travel.components/customer-contract/1.0.2-SNAPSHOT/mappings/", port = 8084)
+----
+
+Or migrate to the new classpath based `@AutoConfigureStubRunner`.
+
+If however you don't want to do that and you want to remain with the old structure
+just set your plugin tasks accordingly. Example for the structure presented in the
+snippet above.
+
+[source,xml,indent=0,subs="verbatim,attributes",role="primary"]
+.Maven
+----
+<!-- start of pom.xml -->
+
+<properties>
+    <!-- we don't want the verifier to do a jar for us -->
+    <spring.cloud.contract.verifier.skip>true</spring.cloud.contract.verifier.skip>
+</properties>
+
+<!-- ... -->
+
+<!-- You need to set up the assembly plugin -->
+<build>
+    <plugins>
+        <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-assembly-plugin</artifactId>
+            <executions>
+                <execution>
+                    <id>stub</id>
+                    <phase>prepare-package</phase>
+                    <goals>
+                        <goal>single</goal>
+                    </goals>
+                    <inherited>false</inherited>
+                    <configuration>
+                        <attach>true</attach>
+                        <descriptor>${basedir}/src/assembly/stub.xml</descriptor>
+                    </configuration>
+                </execution>
+            </executions>
+        </plugin>
+    </plugins>
+</build>
+<!-- end of pom.xml -->
+
+<!-- start of stub.xml-->
+
+<assembly
+	xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.3"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.3 http://maven.apache.org/xsd/assembly-1.1.3.xsd">
+	<id>stubs</id>
+	<formats>
+		<format>jar</format>
+	</formats>
+	<includeBaseDirectory>false</includeBaseDirectory>
+	<fileSets>
+		<fileSet>
+			<directory>${project.build.directory}/snippets/stubs</directory>
+			<outputDirectory>customer-stubs/mappings</outputDirectory>
+			<includes>
+				<include>**/*</include>
+			</includes>
+		</fileSet>
+		<fileSet>
+			<directory>${basedir}/src/test/resources/contracts</directory>
+			<outputDirectory>customer-stubs/contracts</outputDirectory>
+			<includes>
+				<include>**/*.groovy</include>
+			</includes>
+		</fileSet>
+	</fileSets>
+</assembly>
+
+<!-- end of stub.xml-->
+----
+
+[source,groovy,indent=0,subs="verbatim,attributes",role="secondary"]
+.Gradle
+----
+task copyStubs(type: Copy, dependsOn: 'generateWireMockClientStubs') {
+//    Preserve directory structure from 1.0.X of spring-cloud-contract
+    from "${project.buildDir}/resources/main/customer-stubs/META-INF/${project.group}/${project.name}/${project.version}"
+    into "${project.buildDir}/resources/main/customer-stubs"
+}
+----
 
 === 1.1.x -> 1.2.x