Added authorization URL to the Apis

src/main/java/org/scribe/builder/api/LinkedInApi.java

@@ -2,6 +2,8 @@ package org.scribe.builder.api;
 
 public class LinkedInApi extends DefaultApi10a
 {
+  private static final String AUTHORIZE_URL = "https://api.linkedin.com/uas/oauth/authorize?oauth_token=%s";
+
   @Override
   protected String getAccessTokenEndpoint()
   {
@@ -13,4 +15,11 @@ public class LinkedInApi extends DefaultApi10a
   {
     return "https://api.linkedin.com/uas/oauth/requestToken";
   }
+  
+  @Override
+  public String getAuthorizationUrl(Token requestToken)
+  {
+    return String.format(AUTHORIZE_URL, requestToken.getToken());
+  }
+  
 }