/**
\page py_invoice_export Python invoice export
The goal of these example scripts is to export invoices to 
LaTeX or other output formats as desired.

\par Files:
- latex_invoices.py
 
  A first approach which exports invoice data to an .lco file which is subsequently included into the template
 - Templates:
  - Invoice.tex

    File derived vom scrlttr2.tex v0.3. by Juergen Fenn.

    rechnung.sty is used to create the table of entries

- gncinvoice_jinja.py

  A second step. Imports jinja2 templates and fills in the invoices values. More flexibility in creating the output files. Output can be anything: LaTeX, HTML, CSV, XML, ...

 - Templates:
  - Invoice.tex.tmpl

    LaTeX template using rechnung.sty, close to the one used by latex_invoices.py.

  - Invoice_2.tex.tmpl

    LaTeX template using a table to fill in the invoices values. No rechnung.sty required.

- gncinvoicefkt.py

  Some helping functions. Included by latex_invoices.py and gncinvoice_jinja.py.

\par Goals / Issues:
- How much logic in the template, how much preprocessing in the python script ?
- Internationalization - currencies, formatting of numbers, templates
- Providing data of gnucash owner. 

  At the moment this has to be put into the invoices (template/final file) by hand. Access of this data is in KVPs. No support in python-bindings at the moment. c-API to access these values is work in progress. A fork to access these is https://github.com/c-holtermann/gnucash/tree/python-kvp. This is very much work in progress. A discussion can be found in thread http://lists.gnucash.org/pipermail/gnucash-devel/2014-June/037768.html.
- A jinja2 template mimicking the original html invoices

\par See also:
- Modules
 - \ref python_bindings_examples
 - \ref python_bindings
- Pages
 - \ref python_bindings_page
*/