TFCGenViewer 1.5.0

Auto-featured

Add rock editor sub-screen
- Can be opened via the "Edit Rocks" button below "Export Preview" in the preview screen
- See the wiki page for more information about usage
Color gradients are now interpolated over the linear sRGB color space
Changed the default gradients for the Rainfall and Temperature previewers to be more vibrant and distinct
- As part of this, the temp, temperature, rain, and rainfall reference gradients are now separate from the climate gradient, which is now unused by default
Adjust Temperature visualizer range to be -23 to 33 °C