update installation instructions

Author: apexdodge

README.md

@@ -12,7 +12,13 @@ Api2Pdf.com is a REST API for instantly generating PDF documents from HTML, URLs
 
 ## <a name="installation"></a>Installation
 
-    Coming soon
+The Java client library is available as a Maven Package and can be installed with Maven by including the following dependency in your pom.xml file.
+
+    <dependency>
+        <groupId>com.api2pdf.client</groupId>
+        <artifactId>api2pdf</artifactId>
+        <version>1.0.1</version>
+    </dependency>
 
 ## <a name="resources"></a>Resources
 
@@ -173,4 +179,4 @@ To use the merge endpoint, supply a list of urls to existing PDFs. The engine wi
 String[] urls = { "your-url-to-pdf1.pdf", "your-url-to-pdf2.pdf" };
 Api2PdfResponse pdfResponse = a2pClient.merge(urls, true, "test.pdf");
 System.out.println(pdfResponse.getPdf());
-```
+```