Update README.md

add section about use this trex-java-sdk in maven project

Author: leomaatEric

README.md

@@ -8,3 +8,22 @@ Java client SDK provides an implementation for
 you can copy and edit examples/bootstrap directory and compile/run separately
 see examples/bootstrap/README.md
 
+### How to use in Maven project
+Add a dependency to the pom.xml as like below:
+```
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
+                      http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  ...
+  <dependencies>
+    <dependency>
+      <groupId>com.cisco.trex</groupId>
+      <artifactId>trex-java-sdk</artifactId>
+      <version>1.28</version>
+    </dependency>
+       ...
+  </dependencies>
+  ...
+</project>
+```