draft of 2016:column-display annotation
draft of 2016:column-display annotation

Adds contextualized options for:

1. pre-formatting column values using a format string, e.g. `%d`
2. pattern expansion of a template to produce a markdown column presentation whiich may interpolate values from other columns in the table

This is intended to cover basic column value display UX scenarios including links and in-line images.  It is not intended to cover alteration of entire record displays, i.e. it is not for iframe representations of entities.

informatics-isi-edu/ermrest,informatics-isi-edu/ermrest