Added IsComputed check to parameterized statement

Added fieldDef.IsComputed check to CreateParameterizedUpdateStatement,
CreateParameterizedInsertStatement and ReParameterizeInsertStatement.
This check already exists in ToInsertRowStatement and
ToUpdateRowStatement
Support for computed columns

Computed columns get Compute attribute
Merge pull request #327 from WimAtIHomer/v3-fixes

Added IsComputed check to parameterized statement