storing sqlite databases, cache, or template files in a location external to the phar. Copy of the files
would need to be performed in an installation step, phar would not attempt to do this for performance and
security reasons.
+ * make convertToZip/convertToTar rename files and return the new filename. Also, convertToPhar() with full
+ file compression should rename to append .gz or .bz
+ * don't automatically add a stub to .zip or .tar files
+ * don't allow a stub to be added to a .zip/.tar that does not have ".phar" in the filename somewhere
+ * allow read/write on .tar/.zip files that do not contain a stub or alias file
+ * prevent manual addition of stub via $a['.phar/stub.php'] = '<?php my stub';
+ * make createDefaultStub() setDefaultStub() and have it file format-specific so that zip/tar-based phars
+ do not have a phar-specific stub
+ * convertTo*() should always uses the default stub.
X ability to store empty directories [Greg]
X tar support [Greg]
X zip support [Greg]