Update README.md

Replaced gulp-streamify with vinyl-buffer

Added paypal donate button

Added sourcemaps support

removed webpack's babel-loader package

use separate babel-register package for require hook

updated npm run watch task

updated babelify usage to include babel presets

updated react middleware to be used with babel 6.x

added babel-core, babel-loader and babel config

removed unused React reference

updated babelify transform

added babel6 es2015 and react presets

updated dependencies

add license file