Merge pull request #27 from microsoftgraph/feature/maven-snaphot-doc

- documents additional repo to add for maven

Author: baywet

README.md

@@ -33,12 +33,24 @@ Add the dependency in `dependencies` in pom.xml
 
 ```xml
 <dependency>
-	<groupId>com.microsoft.graph</groupId>
-	<artifactId>microsoft-graph-beta</artifactId>
-	<version>0.1.0-SNAPSHOT</version>
+  <groupId>com.microsoft.graph</groupId>
+  <artifactId>microsoft-graph-beta</artifactId>
+  <version>0.1.0-SNAPSHOT</version>
 </dependency>
 ```
 
+Add the repository in `repositories` in pom.xml
+
+```xml
+<repository>
+  <id>sonatype-snapshot</id>
+  <name>Sonatype Snapshot</name>
+  <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+</repository>
+```
+
+>**Note:** if the `repositories` node doesn't exist, add it in `project`. For more information about the maven repositories configuration, [refer to this documentation](https://maven.apache.org/guides/mini/guide-multiple-repositories.html).
+
 ### 1.3 Enable ProGuard (Android)
 
 The nature of the Graph API is such that the SDK needs quite a large set of classes to describe its functionality. You need to ensure that [ProGuard](https://developer.android.com/studio/build/shrink-code.html) is enabled on your project. Otherwise, you will incur long build times for functionality that is not necessarily relevant to your particular application. If you are still hitting the 64K method limit, you can also enable [multidexing](https://developer.android.com/studio/build/multidex.html). Checkout the [recommended rules](./docs/proguard-rules.txt).