add further commandline argument to preproc staff

bin/preproc_staff.sh

@@ -10,11 +10,19 @@ if [ $# -lt 2 ]
 then
     RESEARCH_BUILD=`pwd`"/build"
     echo -e "No building directory was specified."
+elif [ $# -lt 3 ]
+then
+    RESEARCH_BUILD="$2"
+    RESEARCH_STAFF=$RESEARCH_BUILD
+    echo -e "No staff directory was specified."
 else
     RESEARCH_BUILD="$2"
+    RESEARCH_STAFF="$3"
 fi
 mkdir -p $RESEARCH_BUILD
-echo -e "Building into directory $RESEARCH_BUILD ..."
+mkdir -p $RESEARCH_STAFF
+echo -e "Building into directory $RESEARCH_BUILD ..." # perform (inplace) replacement of keys
+echo -e "Building into staff-directory $RESEARCH_STAFF ..." # only prepend titles with links
 
 filename=$(basename -- "$1")
 baseurl='https://www.mat.tuhh.de'
@@ -63,7 +71,7 @@ do
     if [ $# -gt 1 ]
     then
         # append research to staffile
-        echo -e "\n$title\n" >> $RESEARCH_BUILD/$name.md
+        echo -e "\n$title\n" >> $RESEARCH_STAFF/$name.md
     fi
 done