Enable loading multiple component instances
Implement passing client-side params to server

Each endpoint call now passes along an array of client-side configurations for each of the components in the component tree that gets recreated at the server side.
Fix the rest of failing specs
Fix sessions for multiple-instance components
Merge branch 'master' into component-loading-rework

Conflicts:
	javascripts/ext.js
Backward compatibility fix
Fix multiple instance loading
Use 1 feedback slide box for multiple messages
Changelog update