Added example for ContainerRegistryApi (#368).

Author: gmessner

README.md

@@ -12,7 +12,7 @@ To utilize GitLab4J™ API in your Java project, simply add the following de
 ```java
 dependencies {
     ...
-    compile group: 'org.gitlab4j', name: 'gitlab4j-api', version: '4.11.5'
+    compile group: 'org.gitlab4j', name: 'gitlab4j-api', version: '4.11.6'
 }
 ```
 
@@ -23,7 +23,7 @@ dependencies {
 <dependency>
     <groupId>org.gitlab4j</groupId>
     <artifactId>gitlab4j-api</artifactId>
-    <version>4.11.5</version>
+    <version>4.11.6</version>
 </dependency>
 ```
 
@@ -224,6 +224,7 @@ The following is a list of the available sub APIs along with a sample use of eac
 &nbsp;&nbsp;[AwardEmojiApi](#awardemojiapi)<br/>
 &nbsp;&nbsp;[BoardsApi](#boardsapi)<br/>
 &nbsp;&nbsp;[CommitsApi](#commitsapi)<br/>
+&nbsp;&nbsp;[ContainerRegistryApi](#containerregistryapi)<br/>
 &nbsp;&nbsp;[DeployKeysApi](#deploykeysapi)<br/>
 &nbsp;&nbsp;[DiscussionsApi](#discussionsapi)<br/>
 &nbsp;&nbsp;[EpicsApi](#epicsapi)<br/>
@@ -289,6 +290,12 @@ Date until = new Date(); // now
 List<Commit> commits = gitLabApi.getCommitsApi().getCommits(1234, "new-feature", since, until);
 ```
 
+#### ContainerRegistryApi
+```java
+// Get a list of the registry repositories belonging to the specified project
+List<RegistryRepository> registryRepos = gitLabApi.ContainerRegistryApi().getRepositories(projectId);
+```
+
 #### DeployKeysApi
 ```java
 // Get a list of DeployKeys for the authenticated user