Tabs and check script and dependency

Removed tabs (tabs to spaces). Remove the check_deps.sh. removed libwebsocketpp-dev from dependencies. BTW, this is in cmake.yml.

src/DummyAudioDriver.cpp

@@ -517,7 +517,7 @@ namespace pipedal
         result.sampleRates_.push_back(48000);
         result.minBufferSize_ = 16;
         result.maxBufferSize_ = 1024;
-		result.supportsCapture_ = true;
+        result.supportsCapture_ = true;
         result.supportsPlayback_ = true;
         return result;
     }