Symbolic I/O for more enums

- Nearly every enum that gets written to a file now uses a symbolic form rather than a numeric form. Input supports both forms.
- The special node type enum, however, no longer has a symbolic form output operator, as the only place it's output is in the special nodes file which uses the opcode.
- Collected some enums scattered around the files into one place in simpletypes.hpp

src/BoE.vsproj/Common/Common.vcxproj

@@ -71,6 +71,7 @@
   <ItemGroup>
     <ClCompile Include="..\..\classes\creatlist.cpp" />
     <ClCompile Include="..\..\classes\creature.cpp" />
+    <ClCompile Include="..\..\classes\estreams.cpp" />
     <ClCompile Include="..\..\classes\item.cpp" />
     <ClCompile Include="..\..\classes\living.cpp" />
     <ClCompile Include="..\..\classes\location.cpp" />

src/BoE.vsproj/Common/Common.vcxproj.filters

@@ -214,6 +214,9 @@
     <ClCompile Include="..\..\classes\creatlist.cpp">
       <Filter>Classes\Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\classes\estreams.cpp">
+      <Filter>Classes\Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\classes\item.cpp">
       <Filter>Classes\Source Files</Filter>
     </ClCompile>