More work on Makefiles

* renamed makefiles:
   - Shared.mk → Shared.makefile
   - src/Makefile → src/Lanes.makefile
   - unit_tests/Makefile → unit_tests/UnitTests.makefile
   - deep_userdata_example/Makefile → deep_userdata_example/DUE.makefile
* Add a makefile for deep_userdata_example
* added a target 'unit_tests' to build them (not running them yet)
* plus some minor internal improvements

1 files changed, 2 insertions, 2 deletions

diff --git a/Lanes.vcxproj.filters b/Lanes.vcxproj.filters
index 2479f1c..3014132 100644
--- a/Lanes.vcxproj.filters
+++ b/Lanes.vcxproj.filters
@@ -153,7 +153,7 @@
     </ClInclude>
   </ItemGroup>
   <ItemGroup>
-    <None Include="src\Makefile">
+    <None Include="src\Lanes.makefile">
       <Filter>Resource Files\Make\src</Filter>
     </None>
     <None Include="tests\appendud.lua">
@@ -267,7 +267,7 @@
     <None Include="Makefile">
       <Filter>Resource Files\Make</Filter>
     </None>
-    <None Include="Shared.mk">
+    <None Include="Shared.makefile">
       <Filter>Resource Files\Make</Filter>
     </None>
     <None Include="make-vc.cmd">