Merge pull request #22 from kmaasrud/master

Darken git diff colors and add Lua instruction to README

Author: tanvirtin

README.md

@@ -42,6 +42,7 @@ In Lua:
 require('monokai').setup {}
 require('monokai').setup { palette = require('monokai').pro }
 require('monokai').setup { palette = require('monokai').soda }
+require('monokai').setup { palette = require('monokai').ristretto }
 ```
 
 ## Customization

lua/monokai.lua

@@ -112,9 +112,9 @@ M.ristretto = {
   orange = '#f38d70',
   purple = '#a8a9eb',
   red = '#fd6883',
-  diff_add = '#adda78',
-  diff_remove = '#fd6883',
-  diff_change = '#85dacc',
+  diff_add = '#527728',
+  diff_remove = '#842335',
+  diff_change = '#247c6e',
   diff_text = '#23324d',
 }