Merge pull request #3 from Japh/master

Add support for Multi Party Instant Messaging endpoints

src/api/mpim.coffee

@@ -0,0 +1,34 @@
+BaseClass = require './common/base_class'
+
+class MPIM extends BaseClass
+
+  endpoints:
+    close: '/api/mpim.close'
+    history: '/api/mpim.history'
+    list: '/api/mpim.list'
+    mark: '/api/mpim.mark'
+    open: '/api/mpim.open'
+
+  #
+  # Official API Methods
+  #
+  close: (opts = {}, callback) ->
+    @validate.obj opts, [ 'channel' ]
+    @request 'POST', @endpoints.close, opts, callback
+
+  history: (opts = {}, callback) ->
+    @validate.obj opts, [ 'channel' ]
+    @request 'GET', @endpoints.history, opts, callback
+
+  list: (callback) ->
+    @request 'GET', @endpoints.list, {}, callback
+
+  mark: (opts = {}, callback) ->
+    @validate.obj opts, [ 'channel', 'ts' ]
+    @request 'POST', @endpoints.mark, opts, callback
+
+  open: (opts = {}, callback) ->
+    @validate.obj opts, [ 'users' ]
+    @request 'POST', @endpoints.open, opts, callback
+
+module.exports = MPIM

src/slack.coffee

@@ -12,6 +12,7 @@ class Slack
       'emoji': require './api/emoji'
       'groups': require './api/groups'
       'im': require './api/im'
+      'mpim': require './api/mpim'
       'oauth': require './api/oauth'
       'rtm': require './api/rtm'
       'search': require './api/search'