Continued with project:

Continued with project:
- converted single tables per row into one table with header and body
- added column for showing total price for item (price * amount)
- added mime-type for tpl extension
- renamed CSS id to make it more clear
- updated jshop.jar

NOTE: Please note that this change won't fully work as the product instance needs to be set in item instance now (see jshop.jar, method calculateTotalPrice())
Signed-off-by:Roland Häder <roland@mxchange.org>