Added support for method options for both scoping and code completion.

com.google.eclipse.protobuf/src/com/google/eclipse/protobuf/scoping/OptionType.java

diff --git a/com.google.eclipse.protobuf/src/com/google/eclipse/protobuf/scoping/OptionType.java b/com.google.eclipse.protobuf/src/com/google/eclipse/protobuf/scoping/OptionType.java
index 0eb4701..0134c92 100644
--- a/com.google.eclipse.protobuf/src/com/google/eclipse/protobuf/scoping/OptionType.java
+++ b/com.google.eclipse.protobuf/src/com/google/eclipse/protobuf/scoping/OptionType.java
@@ -9,5 +9,5 @@
 package com.google.eclipse.protobuf.scoping;
 
 enum OptionType {
-  FILE, MESSAGE, FIELD;
+  FILE, MESSAGE, FIELD, METHOD;
 }
\ No newline at end of file

com.google.eclipse.protobuf/src/com/google/eclipse/protobuf/scoping/ProtoDescriptor.java

diff --git a/com.google.eclipse.protobuf/src/com/google/eclipse/protobuf/scoping/ProtoDescriptor.java b/com.google.eclipse.protobuf/src/com/google/eclipse/protobuf/scoping/ProtoDescriptor.java
index b9ecf9a..618b2d4 100644
--- a/com.google.eclipse.protobuf/src/com/google/eclipse/protobuf/scoping/ProtoDescriptor.java
+++ b/com.google.eclipse.protobuf/src/com/google/eclipse/protobuf/scoping/ProtoDescriptor.java
@@ -44,6 +44,7 @@
     OPTION_DEFINITION_BY_NAME.put("FileOptions", FILE);
     OPTION_DEFINITION_BY_NAME.put("MessageOptions", MESSAGE);
     OPTION_DEFINITION_BY_NAME.put("FieldOptions", FIELD);
+    OPTION_DEFINITION_BY_NAME.put("MethodOptions", METHOD);
   }
   
   private final Map<OptionType, Map<String, Property>> optionsByType = new HashMap<OptionType, Map<String, Property>>();
@@ -120,7 +121,7 @@
 
   /** {@inheritDoc} */
   public Property lookupOption(String name) {
-    return lookupOption(name, FILE, MESSAGE);
+    return lookupOption(name, FILE, MESSAGE, METHOD);
   }
   
   public Property lookupOption(String name, OptionType...types) {