uc_affiliate2 5.x-2.5

This should be the final release for Drupal 5.
No new development will be done in the Drupal 5 branch (other than quick fixes maybe...)

-- translation updates (some strings weren't translatable)
-- Reimplemented the uc_affiliate2_clicks function.
-- updated the commission removal routines, we don't try to remove commissions that aren't there anymore :)
-- simplified the admin_users form code ( for amounts paid to the affiliate). Thanks to freakalis for the tip
-- we are now compatible with PostgreSQL. Thanks to Chris (cjscullyca) for his fixes
-- fixes to the code we use to generate timestamps and get records from the db. Should be problem free now.
-- the affiliate url now uses user id's instead of names. Old urls still supported, of course. Thanks to lonehorseend.
-- add support for customizable affiliate URL schemes (by jjeff)
-- support for disabling commission for certain payment methods (which means we work with uc_free_order in the mix).
-- added support for "ignoring" a product (exclude from generated links, calculated commission) by setting it's commission to 0.
-- fix for "affiliate code generation user issue" (allow generating links for users other than the current one)
-- fixed error in Downline when ordering by Level (disabled, not possible for now)