Rename read-only fs option to readonly_root_filesystem

The YAML file option for specifying that a function should be read-only is now readonly_root_filesystem

Support extended --tag syntax, read-only fs and assorted fixes.

Changelog:

• Command store deploy still returns 0 when deploy failed
  #473 by martindekov

• Extend last PR to make store deploy return proper status code
  #476 by martindekov was merged 5 days ago

• Fix a possible race between wg.Add and wg.Wait new-contributor
  #470 by rosti

• Extend --tag=branch which tags image with branch and sha
  #465 by martindekov

• faas-cli store deploy - deploys wrong image with mismatched name
  #466 by alexellis

• Add ReadOnlyRootFilesystem to the schema
  #439 by LucasRoesler

• Add exit code 1 for functions that exit with status different than 200 or 202
  #445 by martindekov

Also closed #443 #401

Fixes for registry auth on Swarm with GitLab extended repos

Changelog

• Fixes for registry auth on Swarm with GitLab extended repos via #453 @johnmccabe

Version command and welcome messages on new functions

Changelog:

• Add gateway & provider details to version command #431 @ewilde
• Updated faas-cli new to print welcome message #438 @viveksyngh
• Update license check to 0.2.2 #442 @burtonr
• Add SHA checking to get.sh download script #425 @rgee0

🎉

Fix bug in login command

The login command was not honouring the OPENFAAS_URL env-var for setting the gateway. This release fixes that behaviour.

Build to generate hashes

Includes PR via @rgee0 for creating hashes of release artifacts.

Enable functions needing native modules

This change enables build_option which allows functions to optionally add native modules by including a C/C++ build toolchain. See docs PR openfaas/docs#32 for more

Introduces cloud sub-command

Cloud sub-command is for use with openfaas-cloud and includes the ability to seal secrets using kubeseal

• #416 Add cloud sub-command for sealing secrets

See README.md for usage.

Minor fixes for build/deploy commands

• #399 Accomodate spaces in --build-arg value @rgee0
• #394 #404 Make registry auth optional for store deploy @viveksyngh @alexellis
• 6532f3c Fixes issue with double warning about insecure TLS @alexellis
• b7c6f0b Issue #410 shows registryAuth sent for local Docker images which is not required @alexellis

Make sending registry auth optional

Includes:

• Make sending registry auth optional #388

Enables flag --send-registry-auth for Docker Swarm with private repos. This isn't needed for Kubernetes so it's going behind a flag.