Fix: twitter search error.

[shigeki]

Example of twitter search in the example page was failed as below because the offset parameter is missing. I add the offset parameter as 2 in the example and also put uri.removeEmptyParams() in twitter.js to work even when the offset or other parameters are missing.

http://ql.io/console?s=select%20id%20as%20id%2C%20from_user_name%20as%20user%2C%20text%20as%20text%0A%20%20from%20twitter.search%20where%20q%20%3D%20%22ql.io%22%20limit%205

{

"headers": {
    "content-type": "application/json"
},
"body": {
    "error": "Invalid parameter"
}

}

[shimonchayim]

Thanks for looking into this reviewing your pull request.

[s3u]

Thanks for the catch.

[shigeki]

Is the reason why this is closed because my patch are not accepted after your code review?

[s3u]

Oops - wrong button.

[shigeki]

Thanks for merge. Never mind. I've ever used to do it before.