use hook_process_hashtable instead of request function. Less flexable as we can't check status code or anything (that i've been able to find), but is async
handle some http/status error codes
Handle bad api key specifically
Merge pull request #6 from halkeye/use_async_http_post

Stop blocking the UI waiting for the POST to pushbullet, using hook_process_hashtable callback in Weechat.

All glory to the halkeye for whipping this up!