Patch By Andrà Batosti <batosti@async.com.br> r=LpSolit, a=justdave

Bug 286158: Remove GetSelectableProducts() from globals.pl and use Bugzilla::User::get_selectable_products() instead - Patch by Frédéric Buclin <LpSolit@gmail.com> r=joel,kiko a=justdave

Bug 302650: Product.pm methods don't return what is expected for milestones and versions - Patch by Gabriel Sales de Oliveira <gabriel@async.com.br> r=LpSolit a=justdave

Bug 303413: Remove "use Bugzilla" from all of the pm files.  All of the cgi files already have it loaded, and it causes circular dependencies.
Patch by Max Kanat-Alexander <mkanat@bugzilla.org>
r=justdave a=justdave

Patch By Max Kanat-Alexander <mkanat@bugzilla.org> r=LpSolit, a=justdave

of other items.

Patch By Max Kanat-Alexander <mkanat@bugzilla.org> r=LpSolit, a=justdave

Bug 286294: cleanup editclassifications.cgi and migrate the existent code to use Classification.pm - Patch by Tiago R. Mello <timello@gmail.com> r=LpSolit a=myk

Bug 300532: Update editversions.cgi to use routines from Version.pm and Product.pm - Patch by Tiago R. Mello <timello@async.com.br> r=LpSolit a=myk

Bug 294160: Step 1 (RO): Create libraries for Products, Components, Classifications, Milestones, and Versions - Patch by Tiago R. Mello <timello@async.com.br> r=mkanat a=myk