Check in for task 1,4 and 5

Adding pipelineID to httpresponse message, clearner code for task1

Commit for Refactored task

Unit tests

Removing extra whitespaces.

Removing extra whitespaces.

Removing tabs whitespaces

Making Code tidier.

Style issues Fix

Test-tidy Fixes

components/script/document_loader.rs

@@ -78,6 +78,7 @@ impl DocumentLoader {
         pending.load_async(listener)
     }
 
+
     /// Mark an in-progress network request complete.
     pub fn finish_load(&mut self, load: LoadType) {
         let idx = self.blocking_loads.iter().position(|unfinished| *unfinished == load);