removing SHELL_ logname nad private ssh key variables, towards a more ruby way of configuring vagrant shell scripts
demo static demo, self is basically the same thing
no more configurating using env variables, just set it in Vagrantfile
find vagrant-$script in $PATH
demos explicitly register specific shell provider, remove SHELL_ env
configuration
template Makefile had a docker demo specific ssh command
self demo uses the static shell script
specify vagrant-shell scripts in demo, dont use $PATH
bump: v0.2.8