add log event + small bugfixes.

events/log.go

@@ -0,0 +1,14 @@
+package events
+
+import "fmt"
+
+type Log struct {
+	ID      string `json:"id"`
+	Level   string `json:"level"`
+	Code    string `json:"code"`
+	Message string `json:"message"`
+}
+
+func (l Log) EventDescription() string {
+	return fmt.Sprintf("LOG(id:%s level:%s code:%s :: %s)", l.ID, l.Level, l.Code, l.Message)
+}