Changed registerThread to accept shared_ptrs to fix some issues with polymorphism.

Tacos/include/sta/tacos/thread.hpp

@@ -61,12 +61,12 @@ namespace sta
 			/**
 			 * @brief This function is executed first when this thread is started.
 			 */
-			virtual void init();
+			virtual void init() = 0;
 
 			/**
 			 * @brief The body of the thread's loop. Has to be implemented by the user.
 			 */
-			virtual void func();
+			virtual void func() = 0;
 
 		private: