added openssl as compilation dependency

Cargo.toml

@@ -26,6 +26,7 @@ url = "2.1.0"
 hyper-native-tls = {version = "0.3.0", optional=true}
 mime_guess = "2.0"
 open = "1"
+openssl = { version = "*", features = ["vendored"] }
 # Iron crates
 iron = "0.6.1"
 iron-cors = "0.8.0"