add 'local install' and 'local upgrade'#784

Merged

ferd merged 3 commits intoerlang:masterfrom tsloughter:extract

Sep 10, 2015

+231-19

Commits on Sep 8, 2015

add providers 'local upgrade' and 'local install' for installing/upgrading
tsloughter
committed

Commits on Sep 10, 2015

move local install/upgrade to 'unstable install/upgrade' and print error if windows
tsloughter
committed
update completions and docs for command unstable install and upgrade
tsloughter
committed