POCS install: fails to install astrometry-net

[oguyon]

Log shows:
E: Unable to locate package astrometry-net

Consequently, subsequent packages fail to install, as this command fails:

sudo apt-get -y -qq install
ack
astrometry-net
astrometry-data-tycho2-10-19
byobu
curl
dcraw
exiftool
fonts-powerline
gcc
htop
httpie
jo
jq
libcfitsio-bin
make
nano
vim-nox
supervisor
wget

[wtgee]

Thanks, that would do it. I've put in a fix at #1213. We can also add an --ignore-missing option but I think I would rather it complain more loudly than fail silently.