removed vim-airline from .vimrc and replaced by native vim-script

.vimrc

@@ -121,10 +121,30 @@ if ! &diff
 	let g:syntastic_check_on_wq = 1
 endif
 
-" vim-plug plugins
-call plug#begin('~/.vim/plugged')
-"Plug 'vim-airline/vim-airline'
-Plug 'bling/vim-airline'
-Plug 'vim-airline/vim-airline-themes'
-call plug#end()
-let g:airline_theme='minimalist'
+"tweaking my statusline
+
+function! GitBranch()
+	  return system("git rev-parse --abbrev-ref HEAD 2>/dev/null | tr -d '\n'")
+	endfunction
+
+function! StatuslineGit()
+	  let l:branchname = GitBranch()
+		  return strlen(l:branchname) > 0?'  '.l:branchname.' ':''
+		endfunction
+
+set laststatus=2 "always show statusline
+
+set statusline=
+set statusline+=%#PmenuSel#
+set statusline+=%{StatuslineGit()}
+set statusline+=%#LineNr#
+set statusline+=\ %f
+set statusline+=%m\
+set statusline+=%=
+set statusline+=%#CursorColumn#
+set statusline+=\ %y
+set statusline+=\ %{&fileencoding?&fileencoding:&encoding}
+set statusline+=\[%{&fileformat}\]
+set statusline+=\ %p%%
+set statusline+=\ %l:%c
+set statusline+=\