Corrected require to require_once, was causing unit test failures.
Removed unnecessary require of vcard.php.
Fix #16 : Converted Ant build.xml to use PHP-based Phing instead. Had to change
the way the unit tests get their database connection parameters and establish
a connection. This made phpunit.xml.in obsolete. Updated README.md with new
instructions and project requirements.
Fixes #11 : build.xml now builds api documentation in docs/api. Added this
directory to .gitignore.
Fixes #12 : Packages vCard classes in a namespace. Updates tests. Also fixes some of the inconsistency of VCard vs vCard in identifiers.