Added simple link manager implementation.
Added link admin stuff; unit tests to come.
diff --git a/pom.xml b/pom.xml
index 4f0dd3c..28b3fff 100644
--- a/pom.xml
+++ b/pom.xml
@@ -58,13 +58,13 @@
             <dependency>
                 <groupId>com.google.guava</groupId>
                 <artifactId>guava</artifactId>
-                <version>17.0</version>
+                <version>18.0</version>
             </dependency>
 
             <dependency>
                 <groupId>com.google.guava</groupId>
                 <artifactId>guava-testlib</artifactId>
-                <version>17.0</version>
+                <version>18.0</version>
                 <scope>test</scope>
             </dependency>