Compare golint and gofmt.
Fixes #13.
diff --git a/README b/README
index 4d2a7be..94e970b 100644
--- a/README
+++ b/README
@@ -7,6 +7,9 @@
The output of this tool is a list of suggestions in Vim quickfix format,
which is accepted by lots of different editors.
+Golint differs from gofmt. Gofmt reformats Go source code, whereas
+golint prints out style mistakes.
+
Golint differs from govet. Govet is concerned with correctness, whereas
golint is concerned with coding style. Golint is in use at Google, and it
seeks to match the accepted style of the open source Go project.
