Complete osCommerce code update to Version 2.3.4. All new files introduc...

...ed on catalog side converted for this build.

All admin files are ported from 2.3.4 and the previous changes to invoice and packing slip remain. I did not spot any other changes to admin "files"

ht_product_color_box module changed to use same settings in script tag as 2.3.4 - other new header tags had sort orders changed to 0.
Bootstrap updated to Version 3.2.0 ~ some very small changes to create_account to accommodate BS change.

excanvas.js, html5shiv.js, and respond.js added to ext directory in js folder rather than using CDN. Also added bootstrap-select files - can optionally be used for select elements ~ no new bootstrapped admin files are included here ~ but all these scripts are needed for the ongoing changes in admin.

Installer SQL file updated to install newer header_tag modules for use with this version, as well as install box modules so that it installs like the demo setup.