Patch by Christoph Holtermann:
str_methods.py
- added a flagging system to change the output of the __str__ methods
- added unicode and str-methods to invoice and entry
function_class.py
- added modified add_method and add_classmethods to implement the previous
gnucash_business.py
- add methods_return_instance_lists for method Invoice.GetEntries
git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@20695 57a11ea4-9604-0410-9ed3-97b8803252fd
Patch by Christoph Holtermann:
For the more complex financial objects i chose a different approach.
The printing functions are located in one module. Importing this module adds
these functions as methods to the classes defined in gnucash_core.py.
git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@20145 57a11ea4-9604-0410-9ed3-97b8803252fd
