major improvement of zip/tar-based phar stub execution, now __FILE__ says it is the phar, and not phar/.phar/stub.php,
so that the same stub can be used for phar or tar/zip-based phars
ridiculous speedup of rename() within a phar (something like 1000%)
last of the tar-based phar fixes
new tests for tar-based phars, fix existing tests to use new format of __FILE__