Major Subsystem Rewrite (Reconciler Mk5) (#217)

design.gv

@@ -0,0 +1,30 @@
+digraph Rojo {
+	concentrate = true;
+	node [fontname = "sans-serif"];
+
+	plugin [label="Roblox Studio Plugin"]
+	session [label="Session"]
+	rbx_tree [label="Instance Tree"]
+	imfs [label="In-Memory Filesystem"]
+	fs_impl [label="Filesystem Implementation\n(stubbed in tests)"]
+	fs [label="Real Filesystem"]
+	snapshot_subsystem [label="Snapshot Subsystem\n(reconciler)"]
+	snapshot_generator [label="Snapshot Generator"]
+	user_middleware [label="User Middleware\n(MoonScript, etc.)"]
+	builtin_middleware [label="Built-in Middleware\n(.lua, .rbxm, etc.)"]
+	api [label="Web API"]
+	file_watcher [label="File Watcher"]
+
+	session -> imfs
+	session -> rbx_tree
+	session -> snapshot_subsystem
+	session -> snapshot_generator
+	session -> file_watcher [dir="both"]
+	file_watcher -> imfs
+	snapshot_generator -> user_middleware
+	snapshot_generator -> builtin_middleware
+	plugin -> api [style="dotted"; dir="both"; minlen=2]
+	api -> session
+	imfs -> fs_impl
+	fs_impl -> fs
+}