Fixes for Impress core v 0.1.1 compatibility

Separation .session and .users hashes
Version 0.1.2

* Implemented internal URL rewriting
* Implemented request proxy
* Changed client.req.query to client.query
* Added process id and marker to log
* Refactored impress.dispatcher
* Fixed examples
Version 0.1.2
Merge branch 'master' into develop

Conflicts:
	lib/impress.js