Call parent expressions in member expressions in a nicer way
Call parent expressions in member expressions in a nicer way

Call the parent expressions in member expressions in a clearer way.
Remove _yield, as it was used only in ProertyExpression.

mail-apps/l20n.js,zbraniecki/fluent.js,projectfluent/fluent.js,projectfluent/fluent.js,mail-apps/l20n.js,zbraniecki/fluent.js,Pike/l20n.js,Swaven/l20n.js,zbraniecki/l20n.js,stasm/l20n.js,l20n/l20n.js,projectfluent/fluent.js,Pike/l20n.js