Add nuspec for MonoMac package

Source/OxyPlot.MonoMac/OxyPlot.MonoMac.nuspec

@@ -0,0 +1,26 @@
+<?xml version="1.0"?>
+<package xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
+  <metadata xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
+    <id>OxyPlot.MonoMac</id>
+    <title>OxyPlot for MonoMac</title>
+    <version>0.0.0</version>
+    <authors>Oystein Bjorke</authors>
+    <description>OxyPlot is a plotting library for .NET. This package targets MonoMac apps using the Unified API.</description>
+    <licenseUrl>https://raw.githubusercontent.com/oxyplot/oxyplot/master/LICENSE</licenseUrl>
+    <projectUrl>http://oxyplot.org/</projectUrl>
+    <iconUrl>https://raw.githubusercontent.com/oxyplot/oxyplot/master/Icons/OxyPlot_128.png</iconUrl>
+    <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <tags>xamarin mac monomac unified-api plotting plot charting chart</tags>
+    <dependencies>
+      <dependency id="OxyPlot.Core" version="[0.0.0]"/>
+    </dependencies>
+  </metadata>
+  <files>
+    <file src="..\..\Output\NET40\OxyPlot.MonoMac.???" target="lib\net40" />
+    <file src="..\..\Output\NET45\OxyPlot.MonoMac.???" target="lib\net45" />
+
+
+    <file src="../../README.md" />
+    <file src="../../CHANGELOG.md" />
+  </files>
+</package>