Switch vim colorscheme to gruvbox (#23)

.config/nvim/colors/magicwb.vim

@@ -0,0 +1,60 @@
+" Maintainer: Ulf Urdén
+" Last Change: December 3 2015
+" Description: MagicWB theme for Vim -- see http://sasg.com
+
+set background=dark
+
+hi clear
+
+if exists("syntax_on")
+  syntax reset
+endif
+
+let colors_name = "magicwb"
+
+" Vim >= 7.0 specific colors
+if version >= 700
+  hi CursorLine   guibg=#2d2d2d
+  hi CursorColumn guibg=#2d2d2d
+  hi MatchParen   guifg=#000000 guibg=#857b6f gui=bold
+  hi Pmenu 		    guifg=#000000 guibg=#444444
+  hi PmenuSel     guifg=#000000 guibg=#3B67A2
+endif
+
+" The MagicWB palette is:
+" #000000 Normal text
+" #3B67A2 Mariner (blue)
+" #7B7B7B Boulder (dark grey)
+" #959595 Mountain Mist (grey)
+" #AB907D Sandrift (brown)
+" #AFAFAF Bombay (light grey)
+" #FFA997 Rose Bud (peach)
+" #FFFFFF White
+
+" General colors
+hi Cursor	        guifg=NONE    guibg=#7B7B7B gui=none
+hi Normal 		    guifg=#000000 guibg=#959595 gui=none
+hi NonText 		    guifg=#7B7B7B guibg=#959595 gui=none
+hi LineNr 		    guifg=#7B7B7B guibg=#959595 gui=none
+hi StatusLine 	  guifg=#000000 guibg=#444444 gui=italic
+hi StatusLineNC   guifg=#857b6f guibg=#444444 gui=none
+hi VertSplit 	    guifg=#444444 guibg=#444444 gui=none
+hi Folded 		    guibg=#384048 guifg=#a0a8b0 gui=none
+hi Title		      guifg=#000000 guibg=NONE	  gui=bold
+hi Visual		      guifg=#000000 guibg=#444444 gui=none
+hi SpecialKey	    guifg=#7B7B7B guibg=#959595 gui=none
+hi Search         guifg=#FFA997 guibg=#7B7B7B
+
+" Syntax highlighting
+hi Comment 		    guifg=#7B7B7B gui=italic
+hi Todo 		      guifg=#ffffff guibg=#AB907C gui=italic
+hi Constant 	    guifg=#AFAFAF gui=none
+hi String 		    guifg=#FFA997 gui=italic
+hi Identifier 	  guifg=#3B67A2 gui=none
+hi Function 	    guifg=#3B67A2 gui=none
+hi Type 		      guifg=#000000 gui=none
+hi Statement 	    guifg=#3B67A2 gui=none
+hi Keyword		    guifg=#000000 gui=none
+hi PreProc 		    guifg=#3B67A2 gui=none
+hi Number		      guifg=#AFAFAF gui=none
+hi Special		    guifg=#e7f6da gui=none