slog-rs logging (#171)

* added global slog instance, changed all logging macro formats to include logger instance
* adding configuration to logging, allowing for multiple log outputs
* updates to test, changes to build docs
* rustfmt
* moving logging functions into util crate

api/src/client.rs

@@ -26,14 +26,12 @@ use rest::Error;
 /// returns a JSON object. Handles request building, JSON deserialization and
 /// response code checking.
 pub fn get<'a, T>(url: &'a str) -> Result<T, Error>
-where
-	for<'de> T: Deserialize<'de>,
+	where for<'de> T: Deserialize<'de>
 {
 	let client = hyper::Client::new();
 	let res = check_error(client.get(url).send())?;
-	serde_json::from_reader(res).map_err(|e| {
-		Error::Internal(format!("Server returned invalid JSON: {}", e))
-	})
+	serde_json::from_reader(res)
+		.map_err(|e| Error::Internal(format!("Server returned invalid JSON: {}", e)))
 }
 
 /// Helper function to easily issue a HTTP POST request with the provided JSON
@@ -41,18 +39,15 @@ where
 /// building, JSON serialization and deserialization, and response code
 /// checking.
 pub fn post<'a, IN, OUT>(url: &'a str, input: &IN) -> Result<OUT, Error>
-where
-	IN: Serialize,
-	for<'de> OUT: Deserialize<'de>,
+	where IN: Serialize,
+	      for<'de> OUT: Deserialize<'de>
 {
-	let in_json = serde_json::to_string(input).map_err(|e| {
-		Error::Internal(format!("Could not serialize data to JSON: {}", e))
-	})?;
+	let in_json = serde_json::to_string(input)
+		.map_err(|e| Error::Internal(format!("Could not serialize data to JSON: {}", e)))?;
 	let client = hyper::Client::new();
 	let res = check_error(client.post(url).body(&mut in_json.as_bytes()).send())?;
-	serde_json::from_reader(res).map_err(|e| {
-		Error::Internal(format!("Server returned invalid JSON: {}", e))
-	})
+	serde_json::from_reader(res)
+		.map_err(|e| Error::Internal(format!("Server returned invalid JSON: {}", e)))
 }
 
 // convert hyper error and check for non success response codes