Added nuspec file and surrounding build files for creating a nuget package

Author: Lee Walker

.gitignore

@@ -1,5 +1,7 @@
 !Artifacts/
 Artifacts/*
+!Build/
+Build/*
 !packages/
 packages/*
 SSQLib/bin

SSQLib.nuspec

@@ -0,0 +1,21 @@
+<?xml version="1.0"?>
+<package >
+  <metadata>
+    <id>SSQLib</id>
+    <version>$version$</version>
+    <title></title>
+    <authors>Lee Walker, Elliott Spencer</authors>
+    <owners>Lee Walker</owners>
+    <licenseUrl>https://github.com/leewalkergm/ssqlib/blob/master/LICENSE.txt</licenseUrl>
+    <projectUrl>http://leewalkergm.github.io/ssqlib/</projectUrl>
+    <iconUrl>https://nuget.org/Content/Images/packageDefaultIcon.png</iconUrl>
+    <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <description>A Source Server Query Library</description>
+    <releaseNotes></releaseNotes>
+    <copyright>Copyright &#x00A9; Lee Walker.  All rights reserved.</copyright>
+    <tags>Source Server Query Library Valve Counterstrike Global Offensive</tags>
+  </metadata>
+  <files>
+    <file src="Artifacts\bin\SSQLib\SSQLib.dll" target="lib\net40\" />
+  </files>
+</package>

build.bat

@@ -0,0 +1,23 @@
+@echo Off
+set config=%1
+if "%config%" == "" (
+   set config=Release
+)
+
+set version=1.0.0
+if not "%PackageVersion%" == "" (
+   set version=%PackageVersion%
+)
+
+set nuget=
+if "%nuget%" == "" (
+    set nuget=nuget
+)
+
+%WINDIR%\Microsoft.NET\Framework\v4.0.30319\msbuild SSQLib.sln /p:Configuration="%config%" /m /v:M /fl /flp:LogFile=msbuild.log;Verbosity=diag /nr:false
+
+mkdir Build
+mkdir Build\lib
+mkdir Build\lib\net40
+
+%nuget% pack "SSQLib.nuspec" -NoPackageAnalysis -verbosity detailed -o Build -Version %version% -p Configuration="%config%"