Android: Story order and read filter

Implements #187. Per folder/feed options for story order and read filter with defaults of newest/all.

I would welcome any comments and further testing. So far I have only tested on my phone running 2.3. I also have an HP Touchpad running 4.0 that I will load it onto.

I also don't have any shared stories in my account so haven't tested those yet however I thought it would be good to get the pull request opened for review.