fix test references

update references for unit tests to reference new core and fonts projects. all tests except the public api scanner tests now run successfully.

src/UglyToad.PdfPig.Fonts/AdobeFontMetrics/AdobeFontMetricsParser.cs

@@ -6,7 +6,10 @@
     using Core;
     using Fonts;
 
-    internal static class AdobeFontMetricsParser
+    /// <summary>
+    /// Parses files in the Adobe Font Metrics (AFM) format.
+    /// </summary>
+    public static class AdobeFontMetricsParser
     {
         /// <summary>
         /// This is a comment in a AFM file.
@@ -313,12 +316,18 @@
         /// </summary>
         public const string KernPairKpx = "KPX";
 
+        /// <summary>
+        /// This is a kern pair.
+        /// </summary>
         public const string KernPairKpy = "KPY";
 
         private static readonly char[] IndividualCharmetricsSplit = {';'};
 
         private static readonly char[] CharmetricsKeySplit = {' '};
         
+        /// <summary>
+        /// Parse the font metrics from the input bytes.
+        /// </summary>
         public static AdobeFontMetrics Parse(IInputBytes bytes, bool useReducedDataSet)
         {
             var stringBuilder = new StringBuilder();

src/UglyToad.PdfPig.Fonts/AssemblyInfo.cs

@@ -0,0 +1,3 @@
+using System.Runtime.CompilerServices;
+
+[assembly: InternalsVisibleTo("UglyToad.PdfPig.Tests")]

src/UglyToad.PdfPig.Fonts/TrueType/Tables/HeaderTable.cs

@@ -210,6 +210,10 @@
         [Flags]
         public enum HeaderMacStyle : ushort
         {
+            /// <summary>
+            /// No flags set.
+            /// </summary>
+            None = 0,
             /// <summary>
             /// Bold.
             /// </summary>