Add Cargo category and badges
diff --git a/Cargo.toml b/Cargo.toml
index bff8693..ec6586a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,11 @@
 readme = "README.md"
 keywords = ["readline"]
 license = "MIT"
+categories = ["command-line-interface"]
+
+[badges]
+travis-ci = { repository = "kkawakam/rustyline" }
+appveyor = { repository = "kkawakam/rustyline" }
 
 [dependencies]
 libc = "0.2.7"