response.sendFile() now using utils.mixin() to mix in optional headers
Conflicts:
	lib/response/index.js
repsonse.sendFile(): using responses own headers as default
Conflicts:
	lib/response/index.js
Fix load footer partial

Was loading header twice. Now it load the footer at the bottom instead.
Prevents Error "Converting circular structure to JSON" while sending models to socket

In some cases a model can have a circular structure through associations.
Swig adapter fixed for latest version.

The init() method of Swig is not supported anymore with the latest
version (v.1.0.0), which caused an error when templates were rendered.
setDefaults() seams to be the alternative to the issue.
Fixed swig version number.

Changed the swig version number to the latest version available (v1.0.0
at the moment).
Fix realtime applications

Model need be registered to works on client-side
Fixed layout_footer partial
Fixed .flash documentation examples