Vendor raptor source files (was embedded gitlink)

Tree vendored at upstream 0019c5dd; origin + license recorded in
raptor/VENDOR.txt. Windows SDL dev packages excluded via .gitignore.

raptor/gcc/raptor.workspace

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
+<CodeBlocks_workspace_file>
+	<Workspace title="Workspace">
+		<Project filename="raptor.cbp" />
+		<Project filename="raptorsetup.cbp" />
+	</Workspace>
+</CodeBlocks_workspace_file>