feat(components,version): add extra components, new version

Features:
* dispatcher: add component
* shell: add webshell subcomponent
* config: improve configuration management
* config: add check pre-deploy
* tests: add new tests
* repo: allow to specify and use the dev or testing repos
* ruby: add initial package management (mostly for centos)

Fixes:
* config: yaml_encode passwords, secrets and tokens
* config: move some defaults to pillar
* various random fixes

Documentation:
* examples: some fixes on nginx configs

Tests:
* dependencies: add locale formula and example
* webshell: add webshell example, change localhost to 127.0.0.2

BREAKING CHANGES: Arvados was upgraded to a new version (2.1.0)
  so this formula focuses mostly in that version