Created container.h and added more comprehensive hello world

Added a per-container container.h that inclues useful definitions.
Hello world now is in a separate file not to modify main too often.
hello world now prints container name and id.

scripts/bare/files/container.h.in

@@ -0,0 +1,13 @@
+/*
+ * Autogenerated definitions for this container.
+ */
+#ifndef __CONTAINER_H__
+#define __CONTAINER_H__
+
+
+#define __CONTAINER_NAME__	"%s"
+#define __CONTAINER_ID__	%d
+#define __CONTAINER__		"cont%d"
+
+
+#endif /* __CONTAINER_H__ */