[#71587328] Updating page
[#71587328] Updating page
[#71587328] Updating page
[#71587328] Updating/adding images
[#71587328] Updating page
[#71587328] Updating webhook display format
[#71587328] Updating Webhook responses (JSON)
[#71587328] Fixing markdown syntax error
[#71587328] Updating webhook response content
[#71587328] Updating webhook examples
[#71587328] Updating webhook examples for URL updates

Updating example webhooks to reflect fixes/changes to the logo and url
field transmitted in the webhook.
[#71587328] Adding event webhooks, and updating webhook definitions.
[#71587328] Updating group delete/event update webhooks
[#71587328] Fixed partial URL being send in group delete and all event webhooks
[#71587328] Adding user_removed_from_group documentation.
[#71587328] Updating README contents and format.
Merge pull request #88 from zackurben/dev

[#71587328] Updating documentation for webhooks/service-webhooks changes.