Move memofs and rojo-insta-ext into crates folder

crates/memofs/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "memofs"
+description = "Virtual filesystem with configurable backends."
+version = "0.2.0"
+authors = ["Lucien Greathouse <me@lpghatguy.com>"]
+edition = "2018"
+readme = "README.md"
+license = "MIT"
+homepage = "https://github.com/rojo-rbx/rojo/tree/master/memofs"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+crossbeam-channel = "0.5.1"
+fs-err = "2.3.0"
+notify = "4.0.15"
+serde = { version = "1.0", features = ["derive"] }