Merge pull request #1 from deis/updatectl

Integrating updatectl logic to deisctl
Merge pull request #2 from deis/updatectl

feat(deisctl): updated command instance
feat(deisctl): fix package names
Merge pull request #3 from deis/updatectl

feat(deisctl): fix package names
wip
wip units
feat(deisctl) : change flag to string
Merge pull request #4 from deis/updatectl

WIP testing
fix(upstream): rebase against fleet upstream changes
restructure
add new packages
allow install/uninstall of specific targets
working version of update command args
Merge pull request #5 from deis/updatectl

working version of update command args
allow specific targets
feat(deisctl) : basic working version of updater
deis fixed bugs
deisctl working with updater