Replace old link references.

[ci skip]

Rakefile

@@ -42,7 +42,7 @@ task :scaffolding do
   abs_path = Pathname.new(abs_path).realpath
   puts "\nNew project created in #{abs_path}\n\n"
   puts "To build the new project, you may need to first define and export either 'URHO3D_HOME' or 'CMAKE_PREFIX_PATH' environment variable"
-  puts "Please see http://urho3d.github.io/documentation/a00004.html for more detail. For example:\n\n"
+  puts "Please see http://urho3d.github.io/documentation/_using_library.html for more detail. For example:\n\n"
   puts "$ URHO3D_HOME=#{Dir.pwd}; export URHO3D_HOME\n$ cd #{abs_path}\n$ ./cmake_gcc.sh -DURHO3D_64BIT=1 -DURHO3D_LUAJIT=1\n$ cd Build\n$ make\n\n"
 end
 

Readme.txt

@@ -512,8 +512,8 @@ adhere to the current limitations:
   If you choose not to adhere with this build directory naming convention then
   you will have to install the Urho3D library into your local filesystem in
   order to use the Urho3D library in your external project
-  (See http://urho3d.github.io/documentation/a00001.html#Building_Library and
-  http://urho3d.github.io/documentation/a00004.html#UsingLibraryFromSDK).
+  (See http://urho3d.github.io/documentation/_building.html#Building_Library and
+  http://urho3d.github.io/documentation/_using_library.html#UsingLibraryFromSDK).
 - All the post-CMake workaround and/or bug fixes that are scripted in the batch
   files or shell scripts are not applied to the generated project file.