NOJIRA Added sort option to exporter

Note that this is only valid when context is set.
NOJIRA Round point values for display.

If someone wants the full precision, he can still call with
returnAsArray or go through getProperty. This is only for display
purposes where we probably don’t want a precision of 14 or 15 decimal
places.
NOJIRA Added omitIfNotEmpty setting to exporter

This allows you to define fallback or default sections in your export
that only appear if certain data is not available for the current
record.
NOJIRA Experimental implementation of attribute-based context switch for exporter

This allows you to treat groups of attributes bundled in a container as
a unit for export purposes. Kind of like the <unit> tag in display
templates.
PROV-1030 Expose TEP options via exporter

This allows exporting DateRanges in different formats and/or limit the
output to either the start or the end of a DateRange value.