Bugfixes

Fixed a bug that could produce a problem with HTTP headers in some server configurations.

Minor update with XML dumping enhancements

Trying to fix problems dumping XML

Signed-off-by: Carlos Escribano <carlos@doofinder.com>

Grouped product prices and some bugfixes

Fixes #1882 and #1902

Signed-off-by: Carlos Escribano <carlos@doofinder.com>

Minor update

#1874 - Reduce warnings

Signed-off-by: Carlos <carlos@doofinder.com>