[sudo-sys] changes to doorjam git branches

[Yardena Cohen]

This repo was a mess with many dangling branches and un-committed
code. With some merging magic, I created a new 'master' branch which
all previous branches can fast-forward to, and updated the ref names
on both the door computer and github. I also committed the code which
has been running live for several months, so github now reflects
reality.

I added some things to the gitignore file (node_modules, etc) -
otherwise no checked out files are changed. Only the git refs.

https://github.com/sudoroom/doorjam

There remains one unmerged branch, called "ledstrip", which is very
old (2014) and I didn't want to deal with that.