Added section on Optional<T> use (#127).

Author: gmessner

README.md

@@ -5,11 +5,6 @@ GitLab API for Java (gitlab4j-api) provides a full featured and easy to consume
 
 ---
 
-## Java 8 Requirement
-As of GitLab4J-API 4.8.0 Java 8+ is now required to use GitLab4J-API.
-
----
-
 To utilize the GitLab API for Java in your project, simply add the following dependency to your project's build file:
 
 **Gradle: build.gradle**
@@ -41,6 +36,11 @@ Javadocs are available here: <a href="http://www.messners.com/gitlab4j-api/javad
 
 ---
 
+## Java 8 Requirement
+As of GitLab4J-API 4.8.0, Java 8+ is now required to use GitLab4J-API.
+
+---
+
 ## Using GitLab4J
 
 GitLab4J-API is quite simple to use, all you need is the URL to your GitLab server and the Private Token from your GitLab Account Settings page.  Once you have that info it is as simple as:
@@ -93,15 +93,15 @@ while (projectsPager.hasNext())) {
     }
 }
 ```
-
+---
+## Java 8 Optional&lt;T&gt; Support
+GitLab4J-API supports Java 8 Optional&lt;T&gt; for API calls that result in the return of a single item. Here are a couple of examples on how to use the Java 8 Optional&lt;T&gt; API calls:
 ```java
-// Create a Pager instance that will be used to build a list containing all the commits for project ID 1234
-Pager<Commit> commitPager = gitlabApi.getCommitsApi().getCommits(1234, 20);
-List<Commit> allCommits = new ArrayList<>(commitPager.getTotalItems());
+Optional<Group> optionalGroup =  gitlabApi.getGroupApi().getGroup("my-group-path");
+if (optionalGroup.isPresent())
+    return optionalGroup.get();
 
-// Iterate through the pages and append each page of commits to the list
-while (commitPager.hasNext())
-    allCommits.addAll(commitPager.next());
+return gitlabApi.getGroupApi().addGroup("my-group-name", "my-group-path");
 ```
 ---
 ## Issue Time Estimates