- column label and bind param "truncation" also generate

- column label and bind param "truncation" also generate
deterministic names now, based on their ordering within the
full statement being compiled.  this means the same statement
will produce the same string across application restarts and
allowing DB query plan caching to work better.
- cleanup to sql.ClauseParameters since it was just falling
apart, API made more explicit
- many unit test tweaks to adjust for bind params not being
"pre" truncated, changes to ClauseParameters