Add ability to remove users from channels

Added option to remove users from channels (a community requested feature: #8)

Slack API auth bug fix

Something changed with the way the Slack API handles auth tokens which broke this script (reported here: #6).

This release fixes the issue.

Multi-user Support

Changes:

• Added support to invite multiple users at once (a community requested feature: #4)
• Bumped to major version v1 due to backwards incompatibility. user_email flag has been renamed to emails which now allows for a comma separated list of emails.

Private channel support

• Added support for inviting users to private channels
• Added debug logging flag
• Added proper pagination for conversations.list API call

Initial release of slack-multi-channel-invite

v0.1.0

Added Makefile to build releases