implement Phar equivalent for Tar packages.
implement Phar equivalent for Tar packages.

This code depends on a working implementation of
the phar extension, which has not been released yet,
although it is very close to release.


marcosptf/pear-core,marcosptf/pear-core,marcosptf/pear-core,marcosptf/pear-core,marcosptf/pear-core,marcosptf/pear-core