Implemented loading Settings from file. Implemented mining of Keystore (key pair). Changed Transaction structure a lot. Added an icon to windows build. Changed some HTML.

build.rs

@@ -0,0 +1,9 @@
+extern crate winres;
+
+fn main() {
+    if cfg!(target_os = "windows") {
+        let mut res = winres::WindowsResource::new();
+        res.set_icon("globe_icon.ico");
+        res.compile().unwrap();
+    }
+}