Merge branch 'logfile' of dan/libricochet-go into master

log/log.go

@@ -39,8 +39,23 @@ func New(level Level) *Logger {
 	return &Logger{logger: golog.New(os.Stderr, "", golog.Ldate|golog.Ltime), level: level, everythingFromPatterns: make([]string, 0), nothingExceptPatterns: make([]string, 0)}
 }
 
+// NewFile returns a new Logger that logs to the supplied file with a filter set to the supplied level
+func NewFile(level Level, filename string) (*Logger, error) {
+	logfile, err := os.OpenFile(filename, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0600)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Logger{logger: golog.New(logfile, "", golog.Ldate|golog.Ltime), level: level, everythingFromPatterns: make([]string, 0), nothingExceptPatterns: make([]string, 0)}, nil
+}
+
 var std = New(LevelWarn)
 
+// SetStd sets the default logger all other functions use
+func SetStd(logger *Logger) {
+	std = logger
+}
+
 // filter
 func (l *Logger) filter(level Level) bool {