Dedicated docbook xml file for pagc address_parser

[robe]

This is similar to what we have for tiger geocoder and thinking it too would go in extras.

Though it might need more than one since there is a lot more to know about it and it has a tad bit more than just functions to know about it.

[robe]

okay started this. I made some mistakes because I had diabled my docbok validator.

So revisions are r12727 - r12730

I made it as a separate chapter so we can add multiple sections. Once built -- it should appear right after topology. What is left to do

1) Flesh out the about this 2) Examples for standardize_address function 3) add the parse_address function to functions section 4) Add section for table lex, gaz, rules and what the different fields and elements mean. In particular the rules table which is non-obvious but I assume most of the content from here can be used - ​http://www.pagcgeo.org/docs/html/pagc-11.html#ss11.3

Note I did also add section type which has the stdaddr and for each column what the token number is in rules.

This I lifted off largely from ​http://www.pagcgeo.org/docs/html/pagc-12.html#ss12.2

[robe]

Doc chapter is here: ​http://postgis.net/docs/manual-dev/Address_Standardizer.html

[robe]

already done.