Switch vim colorscheme to gruvbox (#23)

.config/nvim/colors/nicotine.vim

@@ -0,0 +1,34 @@
+" Vim color file
+" Maintainer:  Tuomas Kasmra <kasmra@gmail.com>
+" Last Change:  2007 March 28
+" Version: 1.0
+
+set background=light
+hi clear
+if exists("syntax_on")
+    syntax reset
+endif
+let g:colors_name="nicotine"
+
+hi Normal		guifg=#000000	guibg=#ffffcc
+hi Title		guifg=#000000	guibg=#ffffcc	gui=BOLD
+hi lCursor		guibg=#000000	guifg=NONE
+hi LineNr		guifg=#ffffcc	guibg=#6f8b17
+hi Comment		guifg=#ec0904	gui=NONE
+hi Identifier	guifg=#000000	gui=NONE
+hi Visual		guifg=NONE		guibg=#00ccff	gui=NONE
+hi Directory    guifg=#8b8b8b
+hi NonText      guifg=#6f8b17
+hi Special      guifg=#ff8100
+hi Operator		guifg=#006600	gui=NONE
+hi Statement	guifg=#006600	gui=NONE
+hi TypeDef		guifg=#669900	gui=NONE
+hi Type			guifg=#669900	gui=NONE
+hi Boolean		guifg=#669900	gui=NONE
+hi String       guifg=#9d7d4a	gui=NONE
+hi Number       guifg=#9d7d4a	gui=NONE
+hi Constant     guifg=#9d7d4a	gui=NONE
+hi Function		guifg=#6f8b17	gui=NONE
+hi PreProc		guifg=#6f8b17	gui=NONE
+hi Keyword		guifg=#6f8b17	gui=NONE
+