core: As an experiment, handle running from a subdirectory (generally out/debug or out/release, since people tend to do that). Remove unused File.stat().

src/task.h

@@ -112,12 +112,26 @@ void tf_task_set_db_path(tf_task_t* task, const char* path);
 void tf_task_set_zip_path(tf_task_t* task, const char* path);
 
 /**
-** Get the path to the zipp file being used for static data.
+** Set the path to the root of the project directory for data.
+** @param task The task.
+** @param path The file path or NULL.
+*/
+void tf_task_set_root_path(tf_task_t* task, const char* path);
+
+/**
+** Get the path to the zip file being used for static data.
 ** @param task The task.
 ** @return The zip file path or NULL.
 */
 const char* tf_task_get_zip_path(tf_task_t* task);
 
+/**
+** Get the path to use for reading loose files.
+** @param task The task.
+** @return The path or NULL.
+*/
+const char* tf_task_get_root_path(tf_task_t* task);
+
 /**
 ** Set arbitrary named arguments that will be made available to the task.
 ** @param task The task.