Pica: Use some template magic to define register structures efficiently.

src/common/common.vcxproj

@@ -182,6 +182,7 @@
     <ClInclude Include="mem_arena.h" />
     <ClInclude Include="msg_handler.h" />
     <ClInclude Include="platform.h" />
+    <ClInclude Include="register_set.h" />
     <ClInclude Include="scm_rev.h" />
     <ClInclude Include="std_condition_variable.h" />
     <ClInclude Include="std_mutex.h" />
@@ -221,4 +222,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>