T84900: Apply conversions systematically to build(Get|Put)Query()
T84900: Apply conversions systematically to build(Get|Put)Query()

This commit presents a systematic way of converting values from JS
Objects into Cassandra values. The approach is rather simple: every time
there is a query construction under way, remember the parameters'
attribute names as well (in order they are appended). Then, before
returning the query's CQL and parameters, convert them using the
schema.conversions JS Object containing the conversion functions.

gwicke/restbase-mod-table-cassandra,eevans/restbase-mod-table-cassandra