Switch vim colorscheme to gruvbox (#23)

.config/nvim/colors/settlemyer.vim

@@ -0,0 +1,53 @@
+" Vim color file
+" Maintainer: Max Lynch <lynch3@wisc.edu>
+" URL:  http://muffinpeddler.com
+" Version: 0.1
+"
+" :he group-name
+" :he highlight-groups
+" :he cterm-colors
+
+set background=dark
+if version > 580
+    " no guarantees for version 5.8 and below, but this makes it stop
+    " complaining
+    hi clear
+    if exists("syntax_on")
+	syntax reset
+    endif
+endif
+let g:colors_name="settlemyer"
+
+hi Normal guibg=gray25 guifg=gray85
+hi Cursor guibg=red3 guifg=bg
+
+" Syntax Highlighting
+hi Comment guifg=LightPink
+hi Constant guifg=SpringGreen
+" hi Identifier gui=bold guifg=SkyBlue
+" hi Function guifg=Wheat3
+" hi Type guifg=orange1
+hi Keyword guifg=SkyBlue
+hi PreProc guifg=SkyBlue
+hi Statement guifg=SkyBlue
+hi Type gui=bold guifg=SkyBlue
+hi NonText guifg=DarkGray
+hi Tags guifg=orange1
+
+hi link Character		Constant
+hi link Number			Constant
+hi link Float			Constant
+hi link Function		Statement
+hi link Conditional		Statement
+hi link Repeat			Statement
+hi link Label			Statement
+hi link Operator		Statement
+hi link Keyword			Statement
+hi link Include			PreProc
+hi link Define			PreProc
+hi link Macro 			PreProc
+hi link PreCondit		PreProc
+hi link StorageClass	Type
+hi link Structure		Type
+hi link Typedef			Type
+hi link Tag				Tags