Update gitignore, fix bug in combining delay events

.gitignore

@@ -1,2 +1,3 @@
 /target
 Cargo.lock
+.vscode

src/reskit/soundtrack/engines/echo.rs

@@ -391,7 +391,7 @@ pub fn compact_delays( events: Vec<EchoEvent> ) -> Result<Vec<EchoEvent>, Box<dy
     let mut current_sequence: Vec<EchoEvent> = Vec::new();
     for event in events {
         if let Some( esf_event_type ) = event.iter().next() {
-            if *esf_event_type == ESF_DELAY_SHORT || *esf_event_type == ESF_DELAY_LONG {
+            if *esf_event_type & 0xF0 == ESF_DELAY_SHORT || *esf_event_type == ESF_DELAY_LONG {
                 // Continue to push delay events into current_sequence
                 current_sequence.push( event );
             } else {