Add fugitive to lightline statusbar

vim/settings/lightline.vim

@@ -1,7 +1,15 @@
 let g:lightline = {
       \ 'colorscheme': 'solarized',
+      \ 'active': {
+      \   'left': [ [ 'mode' ],
+      \             [ 'fugitive', 'readonly', 'filename', 'modified' ] ]
+      \ },
       \ 'component': {
       \   'readonly': '%{&readonly?"⭤":""}',
+      \   'fugitive': '%{exists("*fugitive#head")?fugitive#head():""}'
+      \ },
+      \ 'component_visible_condition': {
+      \   'fugitive': '(exists("*fugitive#head") && ""!=fugitive#head())'
       \ },
       \ 'separator': { 'left': '⮀', 'right': '⮂' },
       \ 'subseparator': { 'left': '⮁', 'right': '⮃' }