Methods exposed as ArcGIS geoprocessing tools should use SQLWhereClauseTypeMetadata for where clauses, not UnicodeStringTypeMetadata

[jjr8]

I found a few places, such as the sampling tools, that used UnicodeStringTypeMetadata instead of SQLWhereClauseTypeMetadata. This looks like a simple copy/paste error; it is appropriate to use UnicodeStringTypeMetadata when a method is NOT exposed as a geoproc tool, and I probably accidentally copied this to methods that WERE exposed as geoproc tools.

The consequence of using UnicodeStringTypeMetadata, is that ArcGIS will not bring up the expression builder dialog; you must type in the expression manually.

[jjr8]

Fixed in [126], which will eventually be released in MGET 0.4a1.