[m-dev.] diff: improvements to ODBC interface

[Fergus Henderson]

Simon Taylor, you wrote:
> 
> Estimated hours taken: 1
> 
> Improve the ODBC interface slightly.
> 
> extras/odbc.m
> 	Remove odbc__execute/4. Add odbc__solutions/4 to collect all the
> 	results for a query into a list and odbc__aggregate/6 similar
> 	to std_util:unsorted_aggregate/4.

I think the log message would be clearer if it said

	Rename odbc__execute/4 as odbc__solutions/4.
	Add odbc__aggregate/6 similar to std_util:unsorted_aggregate/4.

Otherwise that change looks fine, so please commit it.

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