Add the list of sessions of the Chamber

Source: http://www.lachambre.be/kvvcr/showpage.cfm?section=/searchlist&language=fr&story=legislat.xml

This lists the dates and types of the sessions of the Belgian Chamber of Representatives, categorized by legislatures.
Add JSON version of the list of sessions

Yay, JSON!

This version of the list can be used programmatically. Database seeds and/or dumps, stats, whatever.