Initial setup of the Promo package.
 * PEAR strture
 * Dataobjects
 * Sql
 * Basic admin
Just require the promotion dataobject at the top of the Application.

This is always going to be required by initModules() so no point trying to control when it's required.
Kill PACKAGE_ID

PACKAGE_ID is no longer used in SiteLayout, and is old cruft not needed in a new package.
cleanup comparisions to use instanceof and compare against ''
CS
more comparision cleanup
promotion total is a float, so don't use a strict comparision.
remove dead code.
Clean up the promotion code pager.

Moving it outside the SwatFrom allows it to be automagically processed.
Just return the PromoPromotionCodeWrapper - less code, same tasty goodness
Remove html from translatable strings.
newline cleanup
Merge pull request #6 from isaacgrant/initial-package

Initial setup of the Promo package.
Load search fields from xml instead of building widgets in PHP.

Test case of how we could structure the methods for easier subclassing. I may move the addAdditionalSearchFields() and getAdditionalSearchFieldsUiXml() methods upstream to Store.
Update to use new Store hooks designed to easily add t the search.

Requires https://github.com/silverorange/store/pull/22
PromoInstance doesn't exist.
Clean up the instance code in load()
Merge pull request #9 from isaacgrant/additional-search-widgets-in-xml

Load search fields from xml instead of building widgets in PHP.
Merge pull request #10 from isaacgrant/no-promo-instance

Cleanup promotion instance references.