more info in readme. link to docs.

nexgb/README

@@ -1,7 +1,19 @@
+XGB is the X Go Binding, which is a low-level API to communicate with the
+core X protocol and many of the X extensions. It is closely modeled after
+XCB and xpyb.
+
+It is thread safe and gets immediate improvement from parallelism when
+GOMAXPROCS > 1. (See the benchmarks in xgb_test.go for evidence.)
+
+Please see doc.go for more info.
+
 BurntSushi's Fork
 =================
 I've forked the XGB repository from Google Code due to inactivty upstream.
 
+Godoc documentation can be found here:
+http://godoc.burntsushi.net/pkg/github.com/BurntSushi/xgb/
+
 Much of the code has been rewritten in an effort to support thread safety
 and multiple extensions. Namely, go_client.py has been thrown away in favor
 of an xgbgen package.