[postgis] Minor changes

[Paul Ramsey]

As per usual, Dave's changes adhere to the CVS version. I am thinking
release in about a week to 10 days (before I go on vacation :)

Dave Blasby wrote:
> 
> 1. There is now a postgis uninstaller.  Just run the 'postgis_undef.sql'
> script and it will delete all the aggregates, functions, operators, and
> types created by postgis.   Running this script will screw up any table
> with a geometry column or index in it, so use it with caution.  It is
> auto-generated by the create_undef.pl script.
> 
> 2. Rtree indexing is now removed from the postgis.sql install script.
> You shouldnt have been using them anyways (use the GiST index).
> 
> 3. Since you must have plpgsql to use the AddGeometryColumn() or
> DropGeometryColumn() functions, the postgis.sql file will give you
> install instructions if its not installed.
> 
> dave
> 
> 
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> 
> 
> 
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     | Paul Ramsey
     | Refractions Research
     | Email: pramsey at refractions.net
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