diff --git a/README.md b/README.md
index 464a4c4..a69271e 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,11 @@ the client side and runs runtime-compiled C++ modules on the server side.
 Go ahead and write some modules and extensions, maybe the minecraftlike will
 exist in the near future!
 
-Further reading: design.txt, conventions.txt
+Further reading:
+
+* doc/design.txt
+* doc/conventions.txt
+* doc/client_api.txt
 
 Buildat Linux How-To
 ====================
diff --git a/client_api.txt b/doc/client_api.txt
similarity index 100%
rename from client_api.txt
rename to doc/client_api.txt
diff --git a/conventions.txt b/doc/conventions.txt
similarity index 100%
rename from conventions.txt
rename to doc/conventions.txt
diff --git a/design.txt b/doc/design.txt
similarity index 100%
rename from design.txt
rename to doc/design.txt
diff --git a/todo.txt b/doc/todo.txt
similarity index 96%
rename from todo.txt
rename to doc/todo.txt
index d98a278..377be4c 100644
--- a/todo.txt
+++ b/doc/todo.txt
@@ -29,3 +29,4 @@ Buildat TODO
   CMake to RCC++
 - Voxel world with arbitrary chunk size and offset, with pluggable loader
   modules. Main world has worldspace_id=1. Try Polyvox.
+- Support Cereal's shared pointer serialization in Lua
diff --git a/whynot.txt b/doc/whynot.txt
similarity index 100%
rename from whynot.txt
rename to doc/whynot.txt
diff --git a/external_issues.txt b/external_issues.txt
new file mode 100644
index 0000000..ed032de
--- /dev/null
+++ b/external_issues.txt
@@ -0,0 +1,10 @@
+Issues in other projects affecting Buildat
+==========================================
+
+Urho3D:
+- It is not possible to implement any kind of custom loading functionality into
+  Urho3D::ResourceCache. It is not inheritable, and it does not provide any way
+  to insert custom loaders in other ways. The only thing we can currently do is
+  wrap GetResource in Lua, and copy the files into a temporary file structure
+  before calling the actual GetResource.
+