[Nuspec] Enhance nuspec

* provide changelog url
* extend title

Fixes nodists#161

build/nodist.template.nuspec

@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
   <metadata>
     <id>nodist</id>
-    <title>nodist</title>
+    <title>nodist - Natural Node.js version management for Windows</title>
     <version>__VERSION__</version>
     <authors>Marcel Klehr</authors>
     <owners>Marcel Klehr</owners>
@@ -14,11 +14,12 @@
     <bugTrackerUrl>https://github.com/marcelklehr/nodist/issues</bugTrackerUrl>
     <tags>node nodejs javascript admin nvm version management</tags>
     <copyright>2013-2016</copyright>
-    <licenseUrl>https://github.com/marcelklehr/nodist</licenseUrl>
+    <licenseUrl>https://github.com/marcelklehr/nodist/blob/master/LICENSE.txt</licenseUrl>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <releaseNotes>https://github.com/marcelklehr/nodist#changelog</releaseNotes>
   </metadata>
   <files>
     <file src="tools\**" target="tools" />
     <!--<file src="content\**" target="content" />-->
   </files>
-</package>
+</package>