docs: def merge(obj):
      """
      Merge contents.
  
      It does a simply merge of all files defined under 'static' key.
  
      If you have JS or CSS file with embeded django tags like {% url ... %} or
      {% static ... %} you should declare them under 'template' key. This
      function will render them and append to the merged output.
  
      To use the render option you have to define both 'config' and 'path' on
      merger dictionary.
      """
  
      merge = ''
  
      for f in obj.get('static', []):
          print 'Merging: {}'. format(f)
          merge += _read(f)
  
      def doless(f):
          print 'Compiling LESS: {}'.format(f)
          ret, tmp = commands.getstatusoutput('lesscpy '+f)
          if ret == 0:
              return tmp
          else:
              print 'LESS to CSS failed for: {} (Do you have lesscpy installed?)'.format(f)
          return ''
  
      if merger.get('config'): #only imports django if we have a config file defined
          import re
  
          for p in merger['path']: sys.path.append(p)
          os.environ.setdefault("DJANGO_SETTINGS_MODULE", merger['config'])
  
          try:
              from django.template.loader import get_template_from_string
              from django.template.base import Context
              from django.utils.encoding import smart_str
              from django.conf import settings
          except:
              print 'Do you really have django well installed?'
              sys.exit(1)
  
          for f in obj.get('template', []):
              print 'Merging django template: {}'. format(f)
              t = _read(f)
  
              if settings.FORCE_SCRIPT_NAME:
                  t = re.sub(r'\{%\s+url\b', settings.FORCE_SCRIPT_NAME+'{% url ', t)
  
              tmp = smart_str(get_template_from_string(t).render(Context({})))
  
              if f.endswith('.less'):
                  pass
                  #TODO compilar tmp para css
  
              merge += tmp
  
      for f in obj.get('less', []):
          merge += doless(f)
  
      return merge