title: colorscheme set in .vimrc is not being applied
body: <p>I have installed zenburn colorscheme to ~/.vim/colors and am trying to enable it by default in the .vimrc file.</p>
  
  <p>I have added <code>colorscheme zenburn</code> to my .vimrc file but the colorscheme is not enabled after vim starts.
  If I manually do <code>:colorscheme zenburn</code> it sets the colorscheme.</p>
  
  <p>If I enable a colorscheme that comes with vi ( for eg desert ) in vimrc, its being enabled at vim startup.</p>
  
  <p>This is my vimrc</p>
  
  <pre><code>filetype plugin on      
  filetype indent on      
  
  set nocompatible        
  set history=500         
  syntax on               
  set expandtab           
  set tabstop=4           
  set shiftwidth=4        
  set softtabstop=4       
  set number              
  set autoindent          
  set cindent             
  set showmatch           
  set matchtime=5         
  set ruler               
  set laststatus=2        
  set hlsearch            
  set incsearch           
  set cursorline          
  set scrolloff=5         
  "set nowrap             
  set foldenable          
  set foldmarker={,}      
  set foldmethod=marker   
  set foldlevel=100       
  "set mouse=a            
  "set mouse=r            
  colorscheme zenburn
  </code></pre>
  
  <p>What should I do to get zenburn colorscheme enabled at startup ?</p>