Switch vim colorscheme to gruvbox (#23)

.config/nvim/colors/spiderhawk.vim

@@ -0,0 +1,22 @@
+" Vim color file
+" Maintainer: Art Cowles
+" Last Change: 2008-07-17
+
+set background=dark
+hi clear
+if exists ("syntax_on")
+  syntax reset
+endif
+let g:colors_name="spiderhawk"
+
+" General colors
+hi Normal     guifg=#ffffff guibg=#000000 gui=none
+hi FoldColumn guifg=#ffffff guibg=#333333 gui=none
+hi Folded     guifg=#ffffff guibg=#333333 gui=italic
+"hi LineNr     guifg=#ffff00 guibg=#111111 gui=none
+"hi NonText    guifg=#00ff00 guibg=#000000 gui=none
+"hi StatusLine                             gui=reverse
+
+" Syntax highlighting
+hi Comment    guifg=#00ff00 guibg=NONE    gui=none
+