Add gvdb_table_write_contents_async()
This is just an async version of gvdb_table_write_contents().
Future work: someone could write an async version of gvdb_table_new(), then sync I/O would no longer be required to construct a GvdbTable.
This is just an async version of gvdb_table_write_contents().
Future work: someone could write an async version of gvdb_table_new(), then sync I/O would no longer be required to construct a GvdbTable.