adding install and jdk version

Author: ronen

.travis.yml

@@ -1 +1,8 @@
 language: java
+jdk:
+  - oraclejdk7
+before_install:
+    - sudo apt-get -qq update
+    - sudo apt-get install -y nmap
+    - sudo ln -s /usr/bin/nmap /usr/local/bin/nmap
+

README.md

@@ -2,3 +2,6 @@
 A Java nmap wrapper, this is a mirror of [sourceforge](http://sourceforge.net/apps/mediawiki/nmap4j/index.php?title=Main_Page#Nmap4j)  repo.
 
 Note that I (narkisr) am not the original author (I just like github better then source forge), please check the sourceforge page and its author.
+
+[![Build Status](https://travis-ci.org/narkisr/nmap4j.png)](https://travis-ci.org/narkisr/nmap4j)
+