Upgraded Stormpath SDK to 1.0.RC2

@lhazlewood This Issue is about updating Shiro and Spring Security to JSDK 1.0.RC2. The servlet module is not available in that version. Are you suggesting to forget about the "environment variables" until the Servlet Module is released? Or to skip this Shiro and Spring release for JSDK 1.0.RC2 altogether and later on create a new one once JSDK 1.0.0 is out?