do not hide pdflatex output in dev mode or make that optional somehow

[AnneGilles]

c3sMembership/c3smembership/presentation/views/membership_certificate.py

Lines 346 to 353 in 6feaea0

	subprocess.call(
	[
	'pdflatex',
	'-output-directory=%s' % tempdir,
	latex_file.name
	],
	stdout=open(os.devnull, 'w'),
	stderr=subprocess.STDOUT # hide output