added tracking id
cleaned up formatting
added before/after shipping actions mirroring before/after payment actions
updated tracking utility functions for purchases
purchase total weight shows on item datils page
Fixed alignment on payment details block.
Don't show label if field is blank.
spelling on comment
Merge branch 'purchase-details-tracking-and-weight'

Conflicts:
	wpsc-admin/css/admin.css
	wpsc-includes/purchaselogs.class.php