Replaced PackageIconUrl with PackageIcon in NuGet packages. Closes #396.

Author: ikkentim

Directory.Build.props

@@ -30,15 +30,19 @@
   </PropertyGroup>
 
   <PropertyGroup Label="Configure default package info" Condition="'$(IsLibrary)' == 'True'">
-    <PackageIconUrl>https://github.com/ikkentim/SampSharp/raw/master/sampsharp.png</PackageIconUrl>
     <PackageProjectUrl>https://github.com/ikkentim/SampSharp</PackageProjectUrl>
+    <PackageIcon>sampsharp.png</PackageIcon>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageTags>gta samp sampsharp</PackageTags>
     <PackageId>$(AssemblyName)</PackageId>
     <Product>$(AssemblyName)</Product>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
   </PropertyGroup>
 
+  <ItemGroup Condition="'$(IsLibrary)' == 'True'">
+    <None Include="$(MSBuildThisFileDirectory)\art\sampsharp.png" Pack="true" PackagePath="\"/>
+  </ItemGroup>
+
   <PropertyGroup Label="Versioning">
     <VersionPrefix>0.0.0</VersionPrefix>
     <VersionSuffix>local</VersionSuffix>