Move logo and palette images to the wiki

README.md

@@ -1,4 +1,4 @@
-<p align="center"><img src="http://svgur.com/i/3Dp.svg"></p>
+<p align="center"><img src="https://raw.githubusercontent.com/wiki/gruvbox-community/gruvbox/images/gruvbox.svg?sanitize=true"></p>
 
 gruvbox is heavily inspired by [badwolf][], [jellybeans][] and [solarized][].
 
@@ -44,11 +44,11 @@ Palette
 
 ### Dark mode
 
-![Palette Dark](http://i.imgur.com/wa666xg.png)
+![Palette Dark](https://raw.githubusercontent.com/wiki/gruvbox-community/gruvbox/images/gruvbox_palette_dark.png)
 
 ### Light mode
 
-![Palette Light](http://i.imgur.com/49qKyYW.png)
+![Palette Light](https://raw.githubusercontent.com/wiki/gruvbox-community/gruvbox/images/gruvbox_palette_light.png)
 
 Contrast options
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