Correct spelling errors in the network protocol. (#8)

diff --git a/register/Register.proto b/register/Register.proto
index aff9ea5..6e8000b 100644
--- a/register/Register.proto
+++ b/register/Register.proto
@@ -32,7 +32,7 @@
     rpc doServiceInstanceRegister (ServiceInstances) returns (ServiceInstanceRegisterMapping) {
     }
 
-    rpc doEndpointRegister (Enpoints) returns (EndpointMapping) {
+    rpc doEndpointRegister (Endpoints) returns (EndpointMapping) {
     }
 
     rpc doNetworkAddressRegister (NetAddresses) returns (NetAddressMapping) {
@@ -86,8 +86,8 @@
     repeated KeyIntValuePair addressIds = 1;
 }
 
-// Endpint register
-message Enpoints {
+// Endpoints register
+message Endpoints {
     repeated Endpoint endpoints = 1;
 }