Update build system and modules.

Rsconscript

@@ -0,0 +1,29 @@
+configure do
+  check_d_compiler
+end
+
+build do
+  Environment.new do |env|
+    sources = []
+    dirs = [
+      "source",
+      "modules/DerelictUtil/source",
+      "modules/DerelictSDL2/source",
+      "modules/DerelictGL3/source",
+      "modules/gl3n/gl3n",
+      "modules/glamour/glamour",
+    ].each do |dir|
+      sources += glob("#{dir}/**/*.d")
+    end
+    env["D_IMPORT_PATH"] += [
+      "modules/DerelictUtil/source",
+      "modules/DerelictSDL2/source",
+      "modules/DerelictGL3/source",
+      "modules/gl3n",
+      "modules/glamour",
+    ]
+    env["DFLAGS"] += ["-fversion=Derelict3", "-fversion=gl3n", "-fversion=SDLImage"]
+    env["LDFLAGS"] += ["-static-libgcc"]
+    env.Program("app", sources)
+  end
+end