Defines the _() method if gettext is not available
Fixes shipping vs. new costs property
Adds ctime to order item so Hiphop doesn't fail in date_create()
Uses common tmp/ directory for dynamically created files
Fixes setup of error handler method
Doesn't use rewind() because Hiphop doesn't seem to support it
Removes check for null value of eval() calls because of Hiphop inconsistency with the PHP documentation
Minor beautification