Replace all occurrences of "<?php echo" and "<?php print" by "<?=" to
reduce noise in templates.

Note that as of PHP 5.4.0, "<?=" is always available and no longer
requires "short_open_tag" to be set.
Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>

Use virtual paths in links (e.g. link to "/packages/" instead of
"/packages.php" etc.) if the virtual path feature is enabled.
Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>

XHTML should be eliminated from lib/ as much as possible. This pulls the XHTML
out of the display_account_info function that echoes the code, and moves it
to the new account_details.php template file.
Signed-off-by: canyonknight <canyonknight@gmail.com>
Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>