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
Fix gperformance-tools setup and apply it to src/engine/tests.
More realistic get_random_gnc_numeric()

Increases the possible denominators to 1E10, but clamps the numerator to
1E13 * denom with 1E19 max. This is equivalent to $1E8/1 US in
Indonesian Rupiah, the currency with the lowest per-unit value in the
world at the time of this commit.
Begin QofInt128 class.

Constructs, adds & subtracts, prints, and compares.

Includes unit tests.
Implement operator*= for QofInt128
Add zero and abs functions to QofInt128.
Add increment, decrement, and shift-eauals operators to QofInt128.

They'll be needed for division.
Operators /= and %= plus function div() for QofInt128.
Some more constructors, for convenience.
Add bitwise operators and binary operators.