Update Composer Configuration

Store all classes under the "Helpers\Tests" namespace in a separate directory than the source code.
Add Autoloader

Create a class autoloader for people who do not use Composer, and for unit testing.
Add PHPUnit Configuration

Create an XML configuration file for PHPUnit, and add the reports it generates to a gitignore file.
Add TestCase for IP Component

Create a test for the IP component, covering 5 out of 8 methods.
Update IP Test

Update the TestCase for the IP component to allow string representations of integers in the IP::mask() method.
Update IP Component

Update the IP component to only allow integers and string representations of integers. Disallow any other data-type.
Add TravisCI Configuration