Perform video uploads from local NSData

[gonxas]

Hey!

I did a couple of little changes on STTwitterAPI to be able to upload a video, from which I already have the NSData, directly to Twitter through STTwitter instead of having to upload it to a server in order to get the url (preventing to have to upload it and then download it, twice).

Do you think you can add this changes to the repo? Or give me access to push it myself?

Thanks!

STTwitterAPI.zip