Webhook URL is not valid anymore

[YouriT]

Slack has changed incoming webhooks URL's, therefore, I would replace:

url = 'https://' + options.domain + '.slack.com/services/hooks/incoming-webhook?token=' + options.token,

by

url = options.endpoint ? options.endpoint : 'https://' + options.domain + '.slack.com/services/hooks/incoming-webhook?token=' + options.token,

To allow flexibility between every kind of endpoints ;)

[YouriT]

Created a PR for this #3

[YouriT]

Some changes has been done on my fork, I republished the plugin as grunt-slack-hook-task to npm, if you get back and include the changes I can remove it. I let you the credits in the package.json file...

See ya !

[EdHurtig]

@YouriT Thank you very much for publishing your fork officially. Funny Timing, was just starting to work on patching this up myself

[YouriT]

My pleasure @EdHurtig :)

[YouriT]

See #6 for a proper PR.