Template stack pull and OAuth token saving

Changelog for 0.10.0:

• PR #620 Use functions.json file for store by @viveksyngh
• PR #716 Add oauth2 token support to all commands by @viveksyngh
• PR #646 NPM package for installing faas-cli by @doowb
• PR #676 Update commands to prefer named functions over yaml files by @HeavyHorst
• PR #668 Add template pull stack by @martindekov
• PR #711 Save oauth tokens to the openfaas config file by @viveksyngh

Generated by Derek