Made ir-black the default color scheme

Switched away from using gui tabs and made some changes to the default text tab via set_tabline.vim plugin.

Added a new mapping <leader>t<leader> that can open a specific tab number.

sources_forked/set_tabline/plugin/set_tabline.vim

@@ -0,0 +1,30 @@
+function! CustomizedTabLine()
+    let s = ''
+    let t = tabpagenr()
+    let i = 1
+    while i <= tabpagenr('$')
+        let buflist = tabpagebuflist(i)
+        let winnr = tabpagewinnr(i)
+        let s .= '%' . i . 'T'
+        let s .= (i == t ? '%1*' : '%2*')
+        let s .= ' '
+        let s .= i . ':'
+        let s .= '%*'
+        let s .= (i == t ? '%#TabLineSel#' : '%#TabLine#')
+        let file = bufname(buflist[winnr - 1])
+        let file = fnamemodify(file, ':p:t')
+        if file == ''
+            let file = '[No Name]'
+        endif
+        let s .= file
+        let s .= ' '
+        let i = i + 1
+    endwhile
+    let s .= '%T%#TabLineFill#%='
+    let s .= (tabpagenr('$') > 1 ? '%999XX' : 'X')
+    return s
+endfunction
+
+" Always show the tablilne 
+set stal=2
+set tabline=%!CustomizedTabLine()