Revert "(GH-141) Remove NuGet nuspec file"

This reverts commit cefa95c.

Author: gep13

nuspec/nuget/GitReleaseManager.nuspec

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<package xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
+  <metadata xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
+    <id>GitReleaseManager</id>
+    <title>GitReleaseManager</title>
+    <version>$version$</version>
+    <authors>GitTools Contributors</authors>
+    <owners>gep13</owners>
+    <licenseUrl>https://github.com/GitTools/GitReleaseManager/blob/develop/LICENSE</licenseUrl>
+    <projectUrl>https://github.com/GitTools/GitReleaseManager</projectUrl>
+    <iconUrl>https://cdn.jsdelivr.net/gh/GitTools/GitReleaseManager@9c547452a10afaf83fce1b5833f4762487b017b7/Icons/package_icon.svg</iconUrl>
+    <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <description>Tool for creating and exporting releases for software applications hosted on GitHub</description>
+    <summary>Tool for creating and exporting releases for software applications hosted on GitHub</summary>
+    <copyright>Copyright (c) 2015 - Present - GitTools Contributors</copyright>
+    <language>en-GB</language>
+    <tags>github release notes create export</tags>
+  </metadata>
+  <files>
+    <file src="..\..\BuildArtifacts\temp\_PublishedApplications\GitReleaseManager.Cli\net451\CommandLine.dll" target="tools" />
+    <file src="..\..\BuildArtifacts\temp\_PublishedApplications\GitReleaseManager.Cli\net451\GitReleaseManager.Core.dll" target="tools" />
+    <file src="..\..\BuildArtifacts\temp\_PublishedApplications\GitReleaseManager.Cli\net451\GitReleaseManager.exe" target="tools" />
+    <file src="..\..\BuildArtifacts\temp\_PublishedApplications\GitReleaseManager.Cli\net451\Octokit.dll" target="tools" />
+    <file src="..\..\BuildArtifacts\temp\_PublishedApplications\GitReleaseManager.Cli\net451\YamlDotNet.dll" target="tools" />
+  </files>
+</package>