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! ;-)
French typo correction

ctte -> cette

Cherry picked from master because I first applied it there by mistake.
Fix line endings in repository to match recent change to .gitattributes
Still more Guile precompilation fixes.

This time for gcc-4.2, used for OSX 10.5-compatible releases.
Remove Windows specializations from gnc-date.c

Now that we're building with a recent GLib version they're no longer needed.
Correct inadvertent change to a still-needed function.
Use standard macro INT64_C() to silence gcc-4.2 complaint

About constants being too large for an int.
Still more Guile library path additions, this time in tests.