PIThreadPoolExecutor & PIBlockingDequeue improvements

- add support move & copy semantic
- introduce submit method for executor with future result

tests/concurrent/testutil.h

@@ -4,11 +4,19 @@
 #include "pithread.h"
 #include <atomic>
 
+template<typename T>
+void print_type_info() {
+	std::cout << typeid(T).name() << " is a "
+			  << (std::is_const<typename std::remove_reference<T>::type>::value ? "const " : "")
+			  << (std::is_lvalue_reference<T>::value ? "lvalue" : "rvalue")
+			  << " reference" << std::endl;
+}
+
 /**
  * Minimum wait thread start, switch context or another interthread communication action time. Increase it if tests
  * write "Start thread timeout reach!" message. You can reduce it if you want increase test performance.
  */
-const int WAIT_THREAD_TIME_MS = 10;
+const int WAIT_THREAD_TIME_MS = 30;
 
 const int THREAD_COUNT = 2;