make  an empty array so implode doesn't fail
add wpsc_purchase_log_csv hook so we can do fun stuff before a CSV download
Use methods instead of accessing properties directly
Don't use wp_convert_bytes_to_hr() deprecated function. Fixes #508.

As per http://core.trac.wordpress.org/ticket/19067, WordPress 3.6 deprecates the wp_convert_bytes_to_hr() function in favour of the size_format() (which was was added in WordPress 2.3).
Fix warning in coupons admin if no order query in URL.
Fix typo in variable function, also, totally fix disabled/readonly issue.

Missed a spot.
Turns out disabling mandatory boxes, while checked, causes them to not be submitted.  This is a problem.

Readonly gives the same effect, but POSTs them properly.
Bump stable tag
Updated readme.md
Retroactively update version number.

git-svn-id: http://plugins.svn.wordpress.org/wp-e-commerce/tags/3.8.12@734600 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fix PHP Notice.
Ignore chef files
Bump version
Merge branch 'branch-3.8.12' of github.com:wp-e-commerce/WP-e-Commerce

Conflicts:
	.gitignore
	readme.md
	wp-shopping-cart.php
	wpsc-admin/init.php
	wpsc-core/wpsc-constants.php