* remove all apt-get calls from check phase of startup
* Fix "n is undefined" config spec change bug (#392)
Fixes the issue where an old config with a new config spec sometimes renders the config inaccessible, with the error `n is undefined`
* updates version numbers
* version change for appmgr
* updates version numbers and welcome message
* adds migration for 0.2.15 to the agent
* actually add 0.2.15 migration to appmgr
Co-authored-by: Chris Guida <chrisguida@users.noreply.github.com>
