Switch vim colorscheme to gruvbox (#23)

.config/nvim/colors/SlateDark.vim

@@ -0,0 +1,56 @@
+"%% SiSU Vim color file
+" SlateDark Maintainer: Rudra Banerjee <bnrj.rudra@yahoo.com> 
+" Originally inspired from Slate by Ralph Amissah
+:set background=dark
+highlight clear
+if version > 580
+ hi clear
+ if exists("syntax_on")
+ syntax reset
+ endif
+endif
+let colors_name = "SlateDark"
+hi Normal guifg=#ffffff guibg=#262626
+hi Cursor guibg=#ffffff guifg=#000000
+hi VertSplit guibg=#c2bfa5 guifg=grey40 gui=none cterm=reverse
+hi Folded guibg=black guifg=grey40 ctermfg=grey ctermbg=darkgrey
+hi FoldColumn guibg=black guifg=grey20 ctermfg=4 ctermbg=7
+hi IncSearch guifg=green guibg=black cterm=none ctermfg=yellow ctermbg=green
+hi ModeMsg guifg=goldenrod cterm=none ctermfg=brown
+hi MoreMsg guifg=SeaGreen ctermfg=darkgreen
+hi NonText guifg=RoyalBlue guibg=grey15 cterm=bold ctermfg=blue
+hi Question guifg=springgreen ctermfg=green
+hi Search guibg=peru guifg=wheat cterm=none ctermfg=grey ctermbg=blue
+hi SpecialKey guifg=yellowgreen ctermfg=darkgreen
+hi StatusLine guibg=#c2bfa5 guifg=black gui=none cterm=bold,reverse
+hi StatusLineNC guibg=#c2bfa5 guifg=grey40 gui=none cterm=reverse
+hi Title guifg=gold gui=bold cterm=bold ctermfg=yellow
+hi Statement guifg=CornflowerBlue ctermfg=lightblue
+hi Visual gui=none guifg=khaki guibg=olivedrab cterm=reverse
+hi WarningMsg guifg=salmon ctermfg=1
+:hi String guifg=SkyBlue ctermfg=darkcyan
+hi Comment term=bold ctermfg=11 guifg=grey40
+hi Constant guifg=#ffa0a0 ctermfg=brown
+hi Special guifg=darkkhaki ctermfg=brown
+hi Identifier guifg=salmon ctermfg=red
+hi Include guifg=red ctermfg=red
+":hi PreProc guifg=red guibg=white ctermfg=red
+"hi Operator guifg=Red ctermfg=Red
+hi Define guifg=gold gui=bold ctermfg=yellow
+hi Type guifg=CornflowerBlue ctermfg=2
+hi Function guifg=navajowhite ctermfg=brown
+hi Structure guifg=green ctermfg=green
+hi LineNr guifg=grey50 ctermfg=3
+hi Ignore guifg=grey40 cterm=bold ctermfg=7
+hi Todo guifg=orangered guibg=yellow2
+hi Directory ctermfg=darkcyan
+hi ErrorMsg cterm=bold guifg=White guibg=Red cterm=bold ctermfg=7 ctermbg=1
+hi VisualNOS cterm=bold,underline
+hi WildMenu ctermfg=0 ctermbg=3
+hi DiffAdd ctermbg=4
+hi DiffChange ctermbg=5
+hi DiffDelete cterm=bold ctermfg=4 ctermbg=6
+hi DiffText cterm=bold ctermbg=1
+hi Underlined cterm=underline ctermfg=5
+hi Error guifg=White guibg=Red cterm=bold ctermfg=7 ctermbg=1
+hi SpellErrors cterm=bold ctermfg=7 ctermbg=1 gui=undercurl,bold