Add more fields to odt template

PDF templates are hard and time consuming to make in contrary to odt templates where everybody can built his own beautiful template.
Unfortunately they miss some functionality.
What I would like to see:

  1. Custom lines: So we can put anything we want to the products and that gets printed
    probably it will be {line_options_xxx}
  2. in case of multiple vat rates have the pure amount for that vat rate except total. somethink like
    object_total_ht_13 for 13% vat and object_total_ht_24 for 24% vat
  3. Maybe the ability to do simple action like adding or multiplied these constants.
    Thank you for this great software.

I agree on all three

The point 1&2 are done.