Fixes#240.
To make this easier, I added a script to aid in downloading icons.
Checkout F-Droid/tools/download-material-icon.sh for more details.
The icons are licensed under the CCv4 attribution license, which I
added a shout out to under "License" in the README.md.
- use 'com.android.support:appcompat-v7:22.0.0' instead of version 20.0.0
- ActionBar color: "F-Droid Blue" (also option for "F-Droid Green")
- fix invisible swap button with Material Design
- remove "Light + dark action bar" theme (as of Action Bar is always blue/green)
* 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.
