Add override file for normal-xhdpi (and higher densities)

Add dimension override file for normal-xhdpi and higher densities, to
ensure that we get the *nice* look and feel in the app as previously
expected.
Merge pull request #133 from ninetwozero/fix-dimens-loading-for-non-hdpi

Add override file for normal-xhdpi (and higher densities)
Merge branch 'dev' into navigation-drawer-extract-soldier-selection