Ben Peddell b0936f2f13 Parse steamcmd output and extract buildid
buildid for public branch is under
depots.branches.public.buildid

The output from app_info_print is a line-oriented
json-like structure which is easily parsed by bash.
2015-06-25 10:19:20 +10:00
..
2015-06-23 23:53:19 +10:00
2015-06-23 23:53:19 +10:00