additional check for empty hoersuppe podcasts array

fixes #80
closes #80
remove podcast.csv not required any more
update readme info about password settings
update gems to prepare for advanced testing
Merge branch 'master' into dev
show 404 if podcast info page could not be found
cleanup routes newlines
generate rspec install
remove rails default tests
customize some rspec settings and add auto test case generation for scaffolding
add some first podcast model rspec tests
complete simple tests
more simple validtion test