Cleanup and overhaul (#21)

* Syntax cleanup

* More minor cleanup, use Linq

* Fix broken features by using correct values

* Feature flags the same

* Features are modular

* No AlphaFS, more .NET versions

* Fix appveyor

* Put back identifiers, for some reason

* String interpolation, modernization

* Better use of GetField

* XmlTextWriter to remove possible issues

* Fix header for OpenMSX

SabreTools.Library/Data/Flags.cs

@@ -249,9 +249,9 @@ namespace SabreTools.Library.Data
         Logiqx =                1 << 0,
 
         /// <summary>
-        /// Logiqx XML (using gmae)
+        /// Logiqx XML (using game)
         /// </summary>
-        LogiqxDepreciated =     1 << 1,
+        LogiqxDeprecated =     1 << 1,
 
         /// <summary>
         /// MAME Softare List XML
@@ -377,6 +377,8 @@ namespace SabreTools.Library.Data
 
         #endregion
 
+        // TODO: Add JSON output. Just for kicks
+
         // Specialty combinations
         ALL = Int32.MaxValue,
     }