switch logging over to log & env_logger crate

src/config.rs

@@ -0,0 +1,20 @@
+use std::io::{self, Write};
+
+use env_logger::fmt::Formatter;
+use log::Record;
+
+pub fn envlogger_write_format(buf: &mut Formatter, rec: &Record) -> io::Result<()> {
+    let level_string = format!("{}", rec.level());
+    let level_style = buf.default_level_style(rec.level());
+    write!(buf, "[")?;
+    write!(buf, "{}", level_style.render_reset())?;
+    write!(buf, "{}", level_style.render())?;
+    write!(buf, "{}", level_string)?;
+    write!(buf, "{}", level_style.render_reset())?;
+    writeln!(
+        buf,
+        " @ {}] {}",
+        chrono::Local::now().format("%Y-%m-%d %H:%M:%S"),
+        rec.args()
+    )
+}