Revert "Check the results of ConfigureWindow requests"

This reverts commit ac1ba76579aea05128199e92fc2d3411c912f0f7.

As is noted in #551, this breaks several things and was committed mostly by
accident. We still want this patch, it just needs more work.
Skip test_resize and test_resize_

We have an open issue for skipping these (#509), and peoples' PRs are failing
(and the build is failing) because of them. We should just ignore these tests
until someone actually fixes them.
Move handing of negative numbers in ConfigureNotify

Change how negative numbers are handled for ConfigureNotify such that we are
still calling the xcffib version of ConfigureNotify, but with bit-twiddled
values that will pack negative and positive numbers correctly.