Re: Preliminary patch for tsearch example dictionaries/pa rsers in contrib

Given all the flap about txid, this surely mustn't go in without public
review first ;-). So, here is a submission from Sergey Karpov to fill
in the lack of any working code examples for user-written tsearch
parsers and dictionaries.

I will be mostly off-line for the next day or so and don't have time to
work on this more now, but here are a few comments:

* It seems a bit odd to put multiple independent contrib modules under a
single subfolder. I'd be inclined to drop the ts_pack layer and just
make the dictionaries and parser be top-level contrib modules.

Please. Putting multiple modules in the same dir will also break the automatic part of the msvc build parser, requiring special-casing it.

/Magnus