Added .editorconfig.

Added the package icon property.

.editorconfig

@@ -0,0 +1,15 @@
+# EditorConfig is awesome:
+http://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Default settings:
+# A newline ending every file
+# Use tabs as indentation
+# Trim trailing whitespace
+[*]
+insert_final_newline = true
+indent_style = space
+indent_size = 4
+trim_trailing_whitespace = true

source/Directory.Build.props

@@ -2,6 +2,7 @@
 
     <PropertyGroup>
         <VersionPrefix>$([System.DateTime]::Now.ToString("yyyy.MM.dd"))</VersionPrefix>
+        <PackageIconUrl>https://github.com/CosmosOS/XSharp/raw/master/source/XSharp.ico</PackageIconUrl>
         <XSharpDescription>X# is a HLA (High Level Assembler) for X86/X64 assembly</XSharpDescription>
     </PropertyGroup>