Add de_DE tax categories, back-ported from HEAD.

[Christian Stimming]

Log Message:
-----------
Add de_DE tax categories, back-ported from HEAD.

2004-12-29  Christian Stimming  <stimming at tuhh.de>

	* src/tax/us/txf-de_DE.scm: Add Tax TXF categories for the de_DE
	locale, i.e. the German tax report. If the current locale begins
	with de_DE, the new German tax categories will be loaded,
	otherwise the conventional U.S. ones. This is the easiest method
	to allow other (non-U.S.) tax categories to be selected in the
	accounts' tax settings.
	
	* src/report/locale-specific/us/taxtxf-de_DE.scm: Add Tax report
	for de_DE locale. If the current locale begins with de_DE, the new
	German tax report will be loaded, otherwise the conventional
	U.S. report.

Tags:
----
gnucash-1-8-branch

Modified Files:
--------------
    gnucash:
        ChangeLog
    gnucash/src/report/locale-specific/us:
        Makefile.am
        gncmod-locale-reports-us.c
        us.scm
    gnucash/src/tax/us:
        Makefile.am
        gncmod-tax-us.c

Added Files:
-----------
    gnucash/src/report/locale-specific/us:
        taxtxf-de_DE.scm
    gnucash/src/tax/us:
        de_DE.scm
        txf-de_DE.scm
        txf-help-de_DE.scm