Switch vim colorscheme to gruvbox (#23)

.config/nvim/colors/h80.vim

@@ -0,0 +1,44 @@
+" author Helder Correia < helder (.) pereira (.) correia (@) gmail (.) com >
+" version 1.0
+" feel free to modify and/or redistribute this file
+
+set background=dark
+
+hi clear
+
+if exists( "syntax_on" )
+    syntax reset
+endif
+
+let g:colors_name="h80"
+
+hi Normal	guifg=White		guibg=#000020
+
+" highlight groups
+hi Cursor	guifg=#e3e3e3		guibg=#D74141
+hi VertSplit	guifg=#075554		guibg=#C0FFFF	gui=none
+hi Folded	guifg=black  		guibg=#FFC0C0
+hi FoldColumn	guifg=tan    		guibg=#800080
+hi ModeMsg	guifg=#404040		guibg=#C0C0C0
+hi MoreMsg	guifg=darkturquoise	guibg=#188F90
+hi NonText	guifg=#9FADC5		guibg=#334C75
+hi Question	guifg=#F4BB7E
+hi Search	guifg=bg     		guibg=fg
+hi SpecialKey	guifg=#BF9261
+hi StatusLine	guifg=#c0ffff		guibg=#004443	gui=none
+hi StatusLineNC	guifg=#004443		guibg=#067C7B	gui=bold
+hi Title	guifg=#8DB8C3
+hi Visual	guifg=black  		guibg=#C0FFC0	gui=bold
+hi WarningMsg	guifg=#F60000				gui=underline
+
+" syntax highlighting groups
+hi Comment	guifg=#666666                           gui=italic
+hi Constant	guifg=#A9EE5A				gui=bold,italic
+hi Identifier	guifg=#555555
+hi Function	guifg=#555555
+hi Statement	guifg=#ff9742                           gui=bold,italic
+hi PreProc	guifg=#F9449A
+hi Type		guifg=#55AAFF                           gui=bold,italic
+hi Special	guifg=#A9EE8A
+hi Todo		guifg=#FFFFFF		guibg=#FF0000
+