Adding winapi crate to support rustyline on windows

Cargo.toml

@@ -14,6 +14,9 @@ libc = "0.2.7"
 nix = "0.5.0"
 unicode-width = "0.1.3"
 encode_unicode = "0.1.3"
+clippy = {version = "~0.0.58", optional = true}
+winapi = "0.2"
+kernel32-sys = "0.2.2"
 
 [dev-dependencies]
 tempdir = "0.3.4"