Multi queries should be combined using double

quotes for the cases when you need to single
quote some Facebook ids. For instance post_id on
a facebook page.

Related to issue :

https://github.com/mcls/fql/issues/6

````ruby
"user_likes": "SELECT user_id FROM like WHERE post_id = '204418407569_10151239646912570'"
````
In the above fql query the post_id needs to be in single quotes. The url creator turns all double quotes in single quotes and breaks this query. The error returned is:
````ruby
Fql::Exception: (#601) Parser error: unexpected '{' at position 0.
	from /Users/miketaylor/.rvm/gems/ruby-1.9.3-p429@kit/gems/fql-0.2.0/lib/fql.rb:57:in `decode_response'
	from /Users/miketaylor/.rvm/gems/ruby-1.9.3-p429@kit/gems/fql-0.2.0/lib/fql.rb:30:in `execute'
````