Update of de.po -still 530 + 53 to review

Rework of
https://github.com/Mechtilde/gnucash/commit/0022bc21f489505ed29a68d1b27f35b5b986e61e
Bug 738477 - WebKit is broken on Win32.

Turns out our URL for loading jqplot is what was broken.
Update of de.po: 351 +50 remaining
Fix Guile-2.0 precompilation.
Revert "Fix Guile-2.0 precompilation."

This reverts commit a26801ab0e12ba44e9dc505ce87dc11ebd26a4ac.
Reapply fix of Guile precompilation without unwanted change in gnc-numeric.c.
Guile precompilation: One more missing library-dir.
Fix the *.win32-bin.txt and downloaded.mt940 attributes.
Guile compilation: One missed CLEANFILES.
Fix guile 2 precompilation of German tax report
Yet another guile 2 precompile fix of the German tax report

The previous one only fixed part of the problem
Update of de.po: 152 + 38 remaining
Add ChangeLog.2013 to dist_doc_DATA

Happy New Year! ;-)
More Guile compilation library links, needed in master but not maint.
Fix up test makefiles to provide linkage paths for Guile2.

Which is apparently not as smart as Guile1 when loading for libs in the current directory.
Except latest Apple clang from long-form error messages.