Squashed 'external/mio/' content from commit 8b6b7d8

git-subtree-dir: external/mio
git-subtree-split: 8b6b7d878c89e81614d05edca7936de41ccdd2da

third_party/config.json

@@ -0,0 +1,11 @@
+{
+	"project": "Cross-platform C++11 header-only library for memory mapped file IO",
+	"target": "../single_include/mio/mio.hpp",
+	"sources": [
+		"../include/mio/mmap.hpp",
+		"../include/mio/page.hpp",
+		"../include/mio/shared_mmap.hpp"
+	],
+	"include_paths": ["../include"]
+}
+