added support for x-hub-signature

hooks/hooks.go

@@ -45,6 +45,10 @@ func (h *Hook) UnmarshalJSON(j []byte) error {
 		h.Cwd = v.(string)
 	}
 
+	if v, ok := m["secret"]; ok {
+		h.Secret = v.(string)
+	}
+
 	if v, ok := m["trigger-rule"]; ok {
 		rule := v.(map[string]interface{})
 
@@ -126,7 +130,7 @@ func New(hookFile string) (*Hooks, error) {
 func (h *Hooks) Match(id string, params interface{}) *Hook {
 	for i := range h.list {
 		if h.list[i].ID == id {
-			if h.list[i].Rule != nil && h.list[i].Rule.Evaluate(params) {
+			if h.list[i].Rule == nil || (h.list[i].Rule != nil && h.list[i].Rule.Evaluate(params)) {
 				return &h.list[i]
 			}
 		}