The backbone for my unit testing
Added commons-lang3
Added slf4j-simple
Testing wifiMacAddress() and fixes
Added tests for wifiInterfaceName()
Added more tests for getIp4Address(), clean up as well
Decided on no throwing IllegalArgumentException any more

Scilently send back nulls and let the client handle it.  Minimize impact to
users.
Dropped logging, this is a simple library

Having a logging requirement might keep people from using this.
Make sure that that overloaded method is called.
Update version
Clean and testing getHostAddressByName()
Adde tests for getNameByMacAddress() & getHostAddressByName()
Very minor PMD fix
Update
Moved static code block to @BeforeClass