Fixed: OTRS Portal - Overview of registered systems (bug#10248).
Added feature to download report data shown in dashboard stats as CSV and PDF.
Fixed: Graph/Chart generation selects slice/background color identical to text color (bug#6323).
Squashed commit of the following:

commit 16d27c25b23c2c0ba0e3f81a1a632750b42355b1
Author: s7design <otrs@s7designcreative.com>
Date:   Tue Feb 4 09:51:05 2014 +0100

    [Bug 6323] Graph/Chart generation selects slice/background color identical to text color

    Deleted black color  for the graphs (Stats::Graph::dclrs) in config XML file, and also deleted black color from list of default color in Stats.pm.

    Note:
    This only define default list of color, but if user want, he can define black colors for the graphs.
Removed the configtimestamp form the filestring to prevent problems in a setup with load balancers.
Updated Polish translation, thanks to Wojciech Myrda.
Removed wrong module strings.
Updated Brazilian Portugese translation, thanks to Murilo Moreira de Oliveira.
Updated Japanese translation, thanks to Norihiro Tanaka.
Added option to recalculate just one stat in otrs.GenerateDashboardStats.pl.