Revert "Update to readme"

This reverts commit 81f92ca.

Author: cmaglie

README.md

@@ -1,7 +1,4 @@
 
-**DEPRECATED: This library has been phased out in favor of: https://github.com/arduino/go-properties-orderedmap**
-Please use the library above for new projects.
-
 [![GoDoc](https://godoc.org/github.com/arduino/go-properties-orderedmap?status.svg)](https://godoc.org/github.com/arduino/go-properties-orderedmap)
 
 Package `properties` is a library for handling maps of hierarchical properties.