Access Token problem
I got everything installed following your directions but I'm receiving this AccessDenied error when I start up homebridge:

[SmartThings] Initializing homebridge-smartthings.SmartThings platform...
[8/2/2016, 4:44:07 AM] [SmartThings] Fetching Smart Things devices.
[8/2/2016, 4:44:08 AM] [SmartThings] Error received type AccessDenied - This request is not authorized by the specified access token
[8/2/2016, 4:44:08 AM] [SmartThings] Unknown Capabilities: []

My app_id and access_token match what I'm seeing in the Smartthings app. Any ideas?
