Add support for swig.
First swig templates.
HTTP errors code as Swig.
Port the remaining views to Swig.
Replace ' with "
Copy swig templates when needed.

Actually we use the viewEngine variable as a placeholder to get Jade or Swig in the same way.
Add swig to the packages needed.
Misstype fix.
Merge pull request #43 from julianxhokaxhiu/master

Add Swig support