add a NODE_MODULE() statement; fixes #222

[booo]

No description provided.

[brianc]

sweet - merging. It builds now - but dies almost right away in testing on pg@9.1.4 with

make[1]: Leaving directory `/home/bmc/src/node-postgres/build'
gyp info ok 
***Testing native bindings***
callback-api-tests.js.node: ../deps/uv/src/unix/core.c:648: uv__io_stop: Assertion `loop->watchers[w->fd] == w' failed.
xargs: node: terminated by signal 6
make: *** [test-native] Error 125

I wont have time to look at this until this evening or perhaps tomorrow, but at least we're on the right path. Thanks!