Add deb/rpm package building and publishing (segmentio#80)

* Add deb/rpm package building and publishing

Basically copied segmentio/chamber#129

* split linux dist/publish

Merge pull request segmentio#61 from logikal/add_aws_okta_profile_env

Add an AWS_OKTA_PROFILE env attribute

fix

Merge pull request segmentio#72 from josacar/go-1.11-fix

Update go-keychain to fix compilation in Go >= 1.11

Merge pull request segmentio#68 from segmentio/fix-duo-auth

the duo auth flow has changed to require another hop, implement that

Merge pull request segmentio#55 from segmentio/systemizer/update-keyrin

use 99designs/keyring instead of dfuentes/keyring.

Merge pull request segmentio#44 from reverson/master

Add Duration flags to login cmd

Checking in vendored libs to fix `go get`

Checking in vendored libs to fix `go get`

Merge pull request segmentio#39 from segmentio/add-analytics

Add analytics