Add unit tests for CRC calculation.
diff --git a/src/test_libFLAC/test_libFLAC.vcxproj.filters b/src/test_libFLAC/test_libFLAC.vcxproj.filters
index b060355..277ec14 100644
--- a/src/test_libFLAC/test_libFLAC.vcxproj.filters
+++ b/src/test_libFLAC/test_libFLAC.vcxproj.filters
@@ -14,6 +14,9 @@
     <ClInclude Include="bitwriter.h">

       <Filter>Header Files</Filter>

     </ClInclude>

+    <ClInclude Include="crc.h">

+      <Filter>Header Files</Filter>

+    </ClInclude>

     <ClInclude Include="decoders.h">

       <Filter>Header Files</Filter>

     </ClInclude>

@@ -37,6 +40,9 @@
     <ClCompile Include="bitwriter.c">

       <Filter>Source Files</Filter>

     </ClCompile>

+    <ClCompile Include="crc.c">

+      <Filter>Source Files</Filter>

+    </ClCompile>

     <ClCompile Include="decoders.c">

       <Filter>Source Files</Filter>

     </ClCompile>