Instantiated variable only if needed
Added a new breakwords
Added support to detect ns even if breakword are not present

To do that I made two assumptions:

* All folders (ie sub namespace) start with an upper letter (PSR-0
 complient)
* Other folders do not start with an upper letter

/home/greg/foo/lib/My/Ns/My/Class.php will be converter to My\Ns\My
Merge pull request #3 from lyrixx/feat-better-finder

Added support to detect ns even if breakword are not present