LP#1092018: Make the reports UI use UTF-8.

LP#1092018: Make the reports UI use UTF-8.

To test:

[1] Install the translation for a language that uses
    non-Latin-1 characters, such as Russian.
[2] Start the XUL staff client and open the reports
    interface.  Note that labels are mangled.
[3] Apply the Apache configuration changes in this patch,
    reload Apache, clear cache in the staff client, and
    reload the reports UI. The labels should now be
    displayed correctly.

Signed-off-by: Pasi Kallinen <pasi.kallinen@pttk.fi>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>