Log Message:
Update to 0.9.93.

Viking 0.9.93 (2010-04-11)
New features since 0.9.92
* Allow overriding map source
* Make GPS layer cut/copy available from popup menu.
* [DOC] Document new files in viking's manpage
* Increase possible smaller zoom
* Add negative scales so that we can have bigger zoom on maps
* Allow images from bigger and smaller zoom to be selected if current zoom has n
o image

Fixes since 0.9.92
* Fix: set a default filename while exporting
* [DOC] Fix: Viking's sources are hosted by Git now
* Further variable type corrections.
* Fix GPS layer copy.
* Fix Track/Waypoint Layer Paste on 64bit systems.
* [DOC] Fix FILES section of manpage.
* Fix: First Track not Black in Draw All Tracks Black Mode.