Create a basic non-Silica UI

[llewelld]

As a developer I'd like to recompile the source for other platforms, so that I can make the app available as widely as possible.

Currently the app has a dependency on Silica and this is the only Sailfish-specific dependency. If this dependency could be removed, it would be possible to rebuild the app for other platforms, such as pinephone for manjaro and archlinux (see #74).

Removing Silica completely doesn't make sense for the Sailfish app (it would make the look and feel of the app terrible), but creating a simple non-Silica QML interface, which could then be tailored for other platforms, should be pretty straightforward.

This blocks #74.

[bionade24]

Maybe we could copy the approach of: https://github.com/rinigus/pure-maps?

[llewelld]

Sounds good, but could you elaborate a little please? I'm not familiar with the way Pure Maps does it.

[bionade24]

Sounds good, but could you elaborate a little please? I'm not familiar with the way Pure Maps does it.

ringius basically Wraps components around certain components like ApplicationWindow which he then puts into folders (named for a specific framework) and then only enables the .qrc files for the specific framework.