Merge pull request #238 from vip30/add-chat-unfurl

Adds support for unfurls in Slack Web AP

Merge pull request #226 from juanazam/add_missing_blocks_arg_to_chat_…

…calls

Add missing blocks optional argument to chat endpoints

Merge pull request #224 from entertainyou/master

Fix crash of put_in/update_in

Merge pull request #223 from entertainyou/master

Set default for bots,channels,groups,users,ims state

Merge pull request #222 from BlakeWilliams/acc-add-conversations-invite

Add conversations.invite web API method

Merge pull request #221 from BlakeWilliams/acc-add-conversations-create

Add conversations.create web API method

Merge pull request #219 from BlakeWilliams/acc-upgrade-jason

[IMPORTANT] Swap Jason for Poison

Merge pull request #217 from BlakeWilliams/acc-upgrade-elixir

Upgrade Elixir to support 1.7.2 through 1.10.1

Merge pull request #216 from BlakeWilliams/acc-use-lower-hexdoc

must set ex_doc to 0.18 for elixir 1.6

Merge pull request #215 from BlakeWilliams/acc-add-chat-schedule-msg

Adds support for scheduling messages in Slack Web API