0.3.18

- fixed issues with db query limit of 500 objects
- fixed issue with URI encoding that affected Yahoo.
- fixed crash on empty ics retrival
- changed some stuff to allow automated testing (still in early stage)
- fixed google resolving (non critical issue)
- now additionally writing log to /media/internal/.org.webosports.cdav.service.log in order to find crashes (i.e. service hangs for days)
- Retry etag retrival without filtering, if filtering is not supported.
- If upload fails with error code that hints for impossible upload, do not retry upload during next sync.
- Fixed minor issues with proxy usage