Update pg 0.16.0 -> 0.17.1
Update pg 0.16.0 -> 0.17.1

== v0.17.1 [2013-12-18] Michael Granger <ged@FaerieMUD.org>

Bugfixes:

- Fix compatibility with signal handlers defined in Ruby. This reverts
  cancelation of queries running on top of the blocking libpq API (like
  Connection#exec) in case of signals. As an alternative the #async_exec
  can be used, which is reverted to use the non-blocking API, again.
- Wrap PQcancel to be called without GVL. It internally waits for
  the canceling connection.

Documentation fixes:

- Fix documentation for PG::Connection::conndefaults.

== v0.17.0 [2013-09-15] Michael Granger <ged@FaerieMUD.org>

Bugfixes:

- Fix crash by calling PQsend* and PQisBusy without GVL (#171).

Enhancements:

- Add method PG::Connection#copy_data.
- Add a Gemfile to allow installation of dependencies with bundler.
- Add compatibility with rake-compiler-dev-box.
- Return self from PG::Result#check instead of nil. This allows
  to stack method calls.

kalw/diffux,kalw/diffux,diffux/diffux,kalw/diffux,diffux/diffux,diffux/diffux