New icon

Many thanks to Nils Rollshausen. He contributed the icon that is used in
launcher. Big png and svg is me tracing it, so if it is ugly, blame
me, if you like it, praise Nils.
Persistent settings and UI cleanup

Settings moved to separate dialog available via PullDown menu, added About
dialog and made settings persistent. You can close application and when you
open it again, settings will be loaded back.
UI cleanup

Got rid of most spacers - 1px transparent rectangles and set the position
properly. Also prepared all strings to be translatable.
Move big icon to comply with harbour policy

Also bump version, persistent changes sounds like a good feature for new version.
Nicer About and show times in consumption

Making hyperlink in about obvious and putting information about time intervals
into battery consumption view.
Ignoring vim temporally files
Improve README