Added a readme

Author: Jijie Chen

BlogML2Hugo/Program.cs

@@ -137,10 +137,6 @@ static string ComposeBlogHeader(BlogMLPost post, Dictionary<string, CategoryRef>
             header.AppendLine("]");
             // header.AppendLine("isCJKLanguage: true");
 
-            if (post.HasExcerpt)
-            {
-                header.AppendLine("]");    
-            }
 
             header.AppendLine("---");
             return header.ToString();

README.MD

@@ -0,0 +1,42 @@
+BlogML to Hugo
+===================
+This tool helps you convert your exported BlogML xml file to Hugo friendly markdown files. 
+Many blog engines can generate BlogML files. If you want to migrate your blog to hugo, this tool may be helpful for you.
+
+
+
+Running the application
+-----------
+
+Some prebuilt binaries are ready for Windows and macOS in the [release section](https://github.com/jijiechen/BlogML2Hugo/releases), but they not work as OS upgrades. If so, please follow following steps in the `Running from source` paragraph to built it by yourself.
+
+Open a command line prompt / terminal / PowerShell, and type in the following commandline (without the $):
+
+```sh
+    $ ./BlogML2Hugo <path-to-blogml.xml> <path-of-content-post-in-hugo>
+```
+
+Wait for completion.
+
+
+Running from source
+-----------
+
+Before running, you need to compile the application from this source. You'll need the [.NET Core command line tool](https://www.microsoft.com/net/download) to compile the application.
+
+```sh
+    $ dotnet build
+```
+
+- Run the application in your command line prompt / terminal.
+
+```sh
+    $ cd BlogML2Hugo
+    $ dotnet run <path-to-blogml.xml> <path-of-content-post-in-hugo>
+```
+
+License
+-----------
+This code is licensed under the [MIT lincense](https://opensource.org/licenses/MIT).
+
+