Pull request for issue #6

Use the current ip address to setup the watcher. 
The new logic does not handle an ip address change.
Added additional permissions to plugin.xml, which are required to get the ip.
Increased version number from 1.0.3 to 1.0.4
Using the second parameter on JmDNS.create does not work on my device with Android 4.0.3. Using just the function with one parameter works. Tested this with Android 4.0.3 and 4.2.2.