changed signal and backtrace managers styles

src/utils/BacktraceManager.cpp

@@ -46,10 +46,10 @@ std::ostream& operator<<(std::ostream& os,
       if (function.size() > 0) {
 	char* demangled = abi::__cxa_demangle(function.c_str(), NULL, NULL, &status);
 	if (status==0) {
-	  os << rang::fgB::yellow << demangled << rang::fg::reset;
+	  os << rang::style::bold << demangled << rang::style::reset;
 	  free(demangled);
 	} else {
-	  os << rang::fgB::yellow << function << rang::fg::reset;
+	  os << rang::style::bold << function << rang::style::reset;
 	}
       }
       os<< '+' << suffix << '\n';

src/utils/SignalManager.cpp

@@ -63,7 +63,7 @@ void SignalManager::handler(int signal)
 	    << rang::fg::reset
 	    << rang::style::bold;
   std::cerr << "Signal "
-    	    << rang::fgB::yellow
+    	    << rang::fgB::red
 	    << signalName(signal)
     	    << rang::fg::reset
 	    << " caught"