v0.0.5-alpha1

0.0.5   - Add setting for where the project files are saved
          Save the project file
          Save the water and contour files
          Optimise contour generation
          Don't load the existing terrain by default
0.0.4   - Load existing terrain file as read-only, if found
          Update icons
          Improve error handling
0.0.3   - Separate out terrain generation
0.0.1   - Initial release