Another round of polishing (#101)

* Implement basic refactorings

* Simplify some match statements

* Rename `ix` to `index`

If we're not going with a single letter name,
then a full word makes more sense.

* Rename `as_hex` to `to_hex`

`as_` implies lossless reinterpretation
while the function does a conversion that loses information

* Replace `for_each` with for loops

for loops are a lot easier to read and maintain.

* factor out x and y coords in Line::render

this is arguably more ergonomic

* Remove redundant `format!(format_args!())`

client/web/wasm/src/utils.rs

@@ -38,7 +38,7 @@ impl log::Log for WasmLog {
 			log::Level::Info => (info, "info", "color:#1b8"),
 			log::Level::Error => (error, "error", "color:red"),
 		};
-		let msg = &format!("{}", format_args!("%c{}\t{}", name, record.args()));
+		let msg = &format!("%c{}\t{}", name, record.args());
 		log(msg, color)
 	}
 	fn flush(&self) {}