Add cargo metadata

serde_macros/Cargo.toml

@@ -2,6 +2,9 @@
 name = "serde_macros"
 version = "0.2.0"
 authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
+license = "MIT/Apache-2.0"
+description = "A quasi-quoting macro system"
+repository = "https://github.com/erickt/rust-quasi"
 
 [lib]
 name = "serde_macros"