[Bug] field collection getter/setter doesn't work in most cases

[dkarlovi]

Q	A
Bug report?	yes
Feature request?	no
BC Break report?	no
RFC?	no
Branch?	master

I've tried to use the field collection getter / setter in three separate instances and always needed to implement my own interpreter in the end. It seems we should be able to define a featureset we wish to solve and then solve it.

Examples which seem broken:

1. localized fields in the collection
2. getters/setters for CSV values (no keys)