Fixes based on review

build/nuget-package.nuspec

@@ -8,14 +8,14 @@
     <licenseUrl>http://code.google.com/p/protobuf-csharp-port/source/browse/license.txt</licenseUrl>
     <projectUrl>http://code.google.com/p/protobuf-csharp-port/</projectUrl>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
-    <copyright>Copyright 2008 Google Inc.  All right s reserved.</copyright>
-    <tags>Protocol Buffers Binary Format Google</tags>
+    <copyright>Copyright 2008 Google Inc.  All rights reserved.</copyright>
+    <tags>Protocol Buffers Binary Serialization Format Google</tags>
 
     <title>Google Protocol Buffers</title>
-    <summary>A managed code generator and library for google's data interchange format.</summary>
+    <summary>A managed code generator and library for Google's data interchange format.</summary>
     <description><![CDATA[
 Protocol Buffers is a binary serialization format and technology, released to the open source community by Google in 2008.  
-It's primary use is to produce small fast binary representations of a 'message' or object for serialization or transportation.
+Its primary use is to produce small fast binary representations of a 'message' or object for serialization or transportation.
 There are various implementations of Protocol Buffers in .NET. This project is a fairly close port of the Google Java implementation.
 
 There are two main parts:
@@ -24,7 +24,7 @@ tools/protoc.exe, which takes the textual representation of the protocol buffer
 tools/ProtoGen.exe, which takes binary representations of protocol buffer descriptors (as generated by the "stock" protoc binary supplied by Google) and creates C# source code. This is only required at build time.
 
 lib/*/Google.ProtocolBuffers.dll, which is a supporting library. This is required at execution time.
-lib/*/Google.ProtocolBuffers.Serialization.dll, a supplimentary library that provides extensions for reading and writing protocol buffers to xml, json, and others.
+lib/*/Google.ProtocolBuffers.Serialization.dll, a supplementary library that provides extensions for reading and writing protocol buffers to xml, json, and others.
 
 LINKS:
 
@@ -32,7 +32,6 @@ Project Home    - http://code.google.com/p/protobuf-csharp-port
 Online Help     - http://help.protobuffers.net
 Developer Guide - http://code.google.com/apis/protocolbuffers/docs/overview.html
 Language Guide  - http://code.google.com/apis/protocolbuffers/docs/proto.html
-Protoc Project  - http://code.google.com/p/protobuf
 
     ]]></description>
   </metadata>