Add a Gallery "Tab"

[chris-hut]

This app should have some more functionality than just a couple of buttons!

Using JakeWhartons Android-ViewPagerIndicator: https://github.com/JakeWharton/Android-ViewPagerIndicator I'm going to add another page/tab that will contain/be a gallery/list of saved snapchat pics and videos.

Currently I have chosen the simple tab example as my application.

[chris-hut]

So commit: 057d278 added the Gallery Tab, but there is nothing there yet!
My task of the day will be to work some magic with a listview to display a very simple file manager type thing, essentially the results of an ls in that directory.

[chris-hut]

So it turns out that Fragments and ListViews can play nicely together - via the ListFragment class!
Going to look into that and make GalleryFragment be a ListFragment!

[chris-hut]

Commit: c0a5c83 added a very basic shouldn't be called it filemanager that is just a listview that displays the files within /storage/sdcard0/snaps/