explaned the new --enable-release argument

Author: Herbert Koelman

README.md

@@ -8,10 +8,11 @@ Of course, this library is a replacement of C++11 features, it is best to use th
 
 To use this library:
 
-    configure
+    configure --enable-release
     make
     make install
 
+> The configure argument --enable-release tells configure to figure out what version your build (this is done through `git` commands)
 Install moves files into your system's default localtion for headers and libraries (often /usr/local/include and /usr/local/lib). Use this command to change install target directory:
 
     configure --prefix=/usr/local