Tiny boot() refactor

Hello anyone, 

Please review the following commits I made in branch 'vinny-boot-refactor'.

c7f36e9bfa0fbb31dc1d9e81c9f4db4653bcdaa5 (2013-09-06 11:17:47 -0300)
Remove session from boot so secret is not hardcoded

851406f9d1ed3496334435fb3eb0e6d946d2e5b9 (2013-09-06 11:17:29 -0300)
Calling afterboot callback after boot is done but before router


R=anyone