Merge pull request #1 from zoovy/master

versioned master, not branch. getting everything back in sync
admin - remove previous version link

This is being removed just for this release, because previous versions
won't support the updated authentication model. This 'may' return for
this release and will return for future versions.
admin orders - added PO # to order edit/view
admin orders - semantics

namespace was wrong on a few invoice data binds.
bug fix for third party extensions

store_checkout not used anymore, so checkout_completes push function
updated to use orderCreate
remove some lingering references to sessionID
admin orders - bug fixes

Fixed a bug in invoice/packing slip printing:
- printing didn't work in 201312
- bulk print showed error message but worked. no error anymore.
store_product - update to generatic add to cart handler

added support for _tag to be passed in. makes this function more
versatile but still very recycle-able.
Merge pull request #2 from zoovy/201312

201312