README: Move items from TODO

Put the differences between kmod and module-init-tools in the README
file so it's more visible.
diff --git a/libkmod/README b/libkmod/README
index d0ca2fc..3e1c8dc 100644
--- a/libkmod/README
+++ b/libkmod/README
@@ -20,7 +20,7 @@
    kmod_unref(ctx);
 
 
-Modules can be created with by various means:
+Modules can be created by various means:
 
    struct kmod_module *mod;
    int err;