Workaround for postgres setup

looks to have an issue in dm-postgres-adapter:
datamapper/dm-postgres-adapter#7

Workaround: Removed Binary type for extension_requester_http
response_data property. Maybe this extension wont works properly..
But now, BeEF start!

extensions/requester/models/http.rb

@@ -27,7 +27,7 @@ class Http
     property :allow_cross_domain, Text, :lazy => false, :default => "true"
 
     # The http response body received. In clear text.
-    property :response_data, Binary, :lazy => true, :length => 2097152
+    property :response_data, Text, :lazy => true
 
     # The http response code. Useful to handle cases like 404, 500, 302, ...
     property :response_status_code, Integer, :lazy => true