Fix Bitbucket.dispatch method
Fix Bitbucket.dispatch method

Request class no longer has the send method, need to use a Session
object to send request. Updating status, error and text variables
from Response object returned by Session.send().

Note:
    This is for the current master branch of kennethreitz/requests
    commit: be62645dd56580dd7576032b348cf79d880851d8

chaiapodi/BitBucket-api,robwilkerson/BitBucket-api,kubilayeksioglu/BitBucket-api,wadevries/BitBucket-api,Sheeprider/BitBucket-api,chaiapodi/BitBucket-api,CBitLabs/BitBucket-api,Sheeprider/BitBucket-api,affinitic/BitBucket-api