Prepare for next development iteration.
Initial i18n support.
Add leading slash to icon paths.
Completely new UI. Closes issues #1 and #6.
Fix share dialog i18n.
Fix setup progress flags.
Revert to previous dialog code.

Don’t know what I was thinking there. Natural size was not as
expected and the code wouldn’t have worked anyway.
Reformat README.md and add section on permissions.
Add section on translating to README.md.
Merge branch 'development'