update doc

Author: antoineco

README.md

@@ -27,6 +27,7 @@ This module is suitable for pretty much any Linux system. It currently supports
 oracle_java will affect the following parts of your system:
 
 * jre/jdk package
+* java alternative +slaves
 
 Including the main class is enough to install the latest version of the Oracle JRE.
 
@@ -70,12 +71,13 @@ class { '::oracle_java':
 }
 ```
 
-Disable checksum validation
+Disable checksum validation and add java alternative
 
 ```puppet
 class { '::oracle_java':
   …
-  check_checksum => false
+  check_checksum  => false,
+  add_alternative => true
 }
 ```
 
@@ -102,8 +104,15 @@ What envionment type to install. Valid values are 'jre' and 'jdk'. Defaults to '
 What format of installation archive to retrieve. Valid values are 'rpm' and 'tar.gz'. Default depends on the platform
 
 #####`check_checksum`
+
 Enable checksum validation on downloaded archives. Boolean value. Defaults to 'true'
 
+#####`add_alternative`
+
+Add Oracle Java to the system alternatives on compatible platforms*. Boolean value. Defaults to 'false'
+
+(*Debian/RHEL/SuSE-like)
+
 ##Limitations
 
 * Prior to Java 8u20, two different releases of the same Java series could not cohabit on the same system when installed from RPM. Each new version would override the previous one. This does not happen with tar.gz archives however.
@@ -114,7 +123,6 @@ The cookie manipulation used by this module to download its installation package
 
 ##To Do
 
-* Add Oracle Java as a 'java' alternative (waiting for an official release of [this module](https://github.com/adrienthebo/puppet-alternatives))
 * Allow the manipulation of Java related environment variables
 
 Features request and contributions are always welcome!