The Toolbar is the new thing from Google which acts as an ActionBar.
It is not a special view like the action bar is, it is
implemented and added to your layout the same as any view.
The InnerView classes of the swap workflow have the choice of what
colour to make the toolbar, so that they can distinguish themselves
as per the mockups (some deep blue, others bright blue).
Added icons for close, but they don't do anything yet.
Minor tweaks to layout so that it looks more like the latest mockups.
* Cleaned up text alignment styles for API < 17.
API v17 has a textAlignment style, wherease previous verisons rely on
the "gravity" property. This change includes gravity="center" where there
was previously only textAlignment="center".
* Fragments get added properly on 2.3 device.
For some reason, when adding the fragment to android.R.id.content, it
wouldn't work on my 2.3 device. This change includes a (almost) empty
activity layout with a single FrameLayout. The fragments are added to
this rather than "content", and it works better. It is not perfect - it
still adds the fargments behind the action bar, and so the action bar
appears blue. But at least they are there :)
* Added translatable strings where constants were used before.
Not related to v2.3 support, but stil important for a stable release,
that is fully translated.
