Fixed the testing problem with nested quotes. This involved adding an additional check into each if-statement inside get_quote_levels() to check that the current quote type on the stack corresponds to the one that we want to remove from the stack. Also added the 'hyperlinked_title' test to the testing quite.
Removed adding the 'hyperref' option to the testing suite, since this is handled transparently, and the option has been removed, so there is nothing to test