code: function updateFiles(files, func, bpath, eh) {
  	try {
  		if (Array.isArray(files) && typeof func === 'function') {
  			for (var i = 0; i < files.length; i++) {
  				var p = path.join(bpath, files[i]), au = '';
  				var content = rbot.file.read(p, {
  					encoding : rbot.file.defaultEncoding
  				});
  				var ec = func(content, p);
  				if (content !== ec) {
  					rbot.file.write(p, ec);
  					return au;
  				}
  			}
  		}
  	} catch (e) {
  		if (typeof eh === 'function') {
  			return eh('Unable to update "' + (Array.isArray(files) ? files.join(',') : '') + '" using: ' + func, e);
  		}
  		throw e;
  	}
  }
docs: Updates file contents using a specified function
  
  @param files
  the {Array} of files to read/write
  @param func
  the function to call for the read/write operation
  @param bpath
  the base path to that will be used to prefix each file used in the
  update process
  @param eh
  an optional function that will be called when the update fails
  @returns {String} the replaced URL (undefined if nothing was replaced)