changed background image location to shared package folder

EIT.sty

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 \ProvidesPackage{EIT-Title}[2017/01/29 v.01 by Matthias Jung]
 
 \RequirePackage{geometry}
@@ -85,7 +81,7 @@
 %%% END OF EIT PACKAGE INPUTS %%%
 
 
-\ThisCenterWallPaper{1.0}{images/background/bg_report_en.pdf}
+\ThisCenterWallPaper{1.0}{style-eit-latex/backgrounds/bg_report_en.pdf}
 
 % Todo Command:
 \newcommand{\todo}[1]{{\bf \color{tuk-red}TODO: [{#1}]}}