cleanup of the presentation generation process

Clean up some bash scripts, that are used for the generation of the
presentation.

Some improvements:
* Only ssh to fsmi-login if not already running on a fsmi host.
* Use the defined postgresql service instead of manually specifing the host
* Fix bugs that could occure when having spaces in filenames
* Find the fslogo.png in the root when generating the presentation

Signed-off-by: Tobias Wiese <tobias@tobiaswiese.com>

prepare_presentation.sh

@@ -1,16 +1,18 @@
-#!/bin/bash
-dest_file="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )/data/presentation_$(date +%Y-%m-%d).tex"
+#!/bin/sh
+set -e
+dest_file="$(realpath "$(dirname "$0")")/data/presentation_$(date +%Y-%m-%d).tex"
 
 echo Reading old protocols
 ./read_db.sh
 echo Getting E-Mail
 ./read_ubmails.py
 echo Generating
-./generate.py --presentation > $dest_file
+./generate.py --presentation >"$dest_file"
 
 echo Compiling
+mkdir -p data/presentation
 cd data/presentation/
-pdflatex $dest_file > /dev/null
-pdflatex $dest_file > /dev/null
-pdflatex $dest_file > /dev/null
 
+for _ in $(seq 3); do
+	pdflatex "$dest_file"
+done