gempress: add example

.gitignore

@@ -1 +1,2 @@
 /target
+*.pem

lib/gempress/examples/simple.rs

@@ -0,0 +1,24 @@
+mod gempress;
+
+use gempress::{Gempress, Request, Response};
+use std::path::Path;
+
+pub fn handler(req: &Box<Request>, res: &mut Box<Response>) {
+    res.send("Hello World!\n");
+}
+
+fn main() {
+    // Run make_cert.sh to generate a certificate
+    let config = Gempress::Config {
+        certPath: Path::new("../cert.pem");
+        keyPath: Path::new("../key.pem");
+    }
+
+    let app = Gempress::new(config);
+
+    app.on("/", handler);
+
+    app.listen(1965, || {
+        println!("Listening on port 1965");
+    });
+}

lib/gempress/make_cert.sh

@@ -0,0 +1 @@
+openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes -subj '/CN=localhost'