Move readme parts to their corresponding packages

log/README.md

@@ -0,0 +1,27 @@
+## Log
+
+Package `log` wraps [logrus](https://github.com/sirupsen/logrus) with a set of
+convenient short functions. It can also add values to context for future 
+logging.
+
+```go
+import "github.com/localhots/gobelt/log"
+```
+
+```go
+ctx := context.Background()
+ctx = log.ContextWithFields(ctx, log.F{"email": params["email"]})
+
+user, err := signup(ctx, params)
+if err != nil {
+    log.Errorf(ctx, "Signup failed: %v", err)
+    // [ERRO] Signup failed: db: duplicate entry    email=bob@example.com
+    return
+}
+
+log.Info(ctx, "New user signed up", log.F{
+    "id":   user.ID,
+    "name": user.Name,
+})
+// [INFO] New user signed up    email=bob@example.com  id=14  name="Bob Fierce"
+```