'Main function for sending the request to facebook
**Example**::
FacebookConnection.request(\'me\')
:param path:
The path to request, examples: /me/friends/, /me/likes/
:param post_data:
A dictionary of data to post
:param parms:
The get params to include'

@classmethod
def request(cls, path='', post_data=None, old_api=False, **params):

    api_base_url = (cls.old_api_url if old_api else cls.api_url)
    if getattr(cls, 'access_token', None):
        params['access_token'] = cls.access_token
    url = ('%s%s?%s' % (api_base_url, path, urlencode(params)))
    response = cls._request(url, post_data)
    return response
