Created LinkService and added unit tests.

Change-Id: I1f2104c873e5a9e2df34074d36cddc823e3b3ec5
diff --git a/lib/BUCK b/lib/BUCK
index 8a9d663..6db1b6b 100644
--- a/lib/BUCK
+++ b/lib/BUCK
@@ -111,7 +111,6 @@
   name = 'GRPC_1.3',
   visibility = ['PUBLIC'],
   exported_deps = [
-    ':grpc-core-1.3.0',
     ':grpc-protobuf-1.3.0',
     ':grpc-stub-1.3.0',
     ':grpc-netty-1.3.0',
diff --git a/lib/deps.json b/lib/deps.json
index 6ff4604..82992bd 100644
--- a/lib/deps.json
+++ b/lib/deps.json
@@ -70,7 +70,7 @@
       "netty-common"
     ],
     "GRPC_1.3": [
-      "grpc-core-1.3.0",
+//      "grpc-core-1.3.0",
       "grpc-protobuf-1.3.0",
       "grpc-stub-1.3.0",
       "grpc-netty-1.3.0",