Twit 01 android dev tweets

Performs OAuth using the "signpost" library. Retrieves a number of #AndroidDev Tweets from twitter and displays in a custom list. All REST api requests are done via AsyncTask and apache http client.
@Mecharyry to elaborate using a paraphrased version of Toto's explanation to me:

> When you write your layouts, you want to leave enough information in the layout itself to understand how it's going to be laid out. If there's anything that affects what the parent viewgroup is going to do (namely, anything that is prefixed with `layout_`), then leave that in the layout, and don't extract it into a style, because it's contextual information, not associated with the view itself.