Add methods for error handling

First cut at a "unified" error handling API. The main thing that is missing
currently is a switch in the dbh to indicate what to do with the errors.

Added fetchAll and fetchSingle methods for data retrieval.

Removed unused vars.

ZTS fix.

Fixed build.

Allow static builds.

should be a strcmp, not a strncmp, thanks, wez

was leaking query_string's

support the read-only property 'queryString'

Tweaks for win32

handle binding/quoting of queries for drivers with emulated prepares

Skeleton for emulated prepare()

Quoting here leads to problems with databases that really support bound parameters.
We should do this conditionally based on the emulate_prepare flag.

only rewrite tmp if quoter returns true

auto-quote values before binding them in at execute time

Allow PDO to build as a self-contained extension.
Install headers so that other self-contained extensions may them.

Some pedantic fixes for gcc.

Hello PDO.

Still more to come. Give it a couple of days before starting to write drivers
for the other databases; a few things might change, so I'd like to coordinate
that, but in a

Hello PDO.

Still more to come. Give it a couple of days before starting to write drivers
for the other databases; a few things might change, so I'd like to coordinate
that, but in a couple of days.

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