rename buildscripts to just script

they don't all actually build, more standard naming as
just script
look to local so we dont rely on internet
keep vendor/cache and ignore vendor/gems
mispelling of script, didnt meant to be plural
server doesnt need to call cibuild
test out bundle install
initial setup instructions
install gems from local vendor/cache

no need to use the internet to get gems we have
locally
Merge pull request #133 from githubschool/scripts-organization-cleanup

Scripts organization cleanup