Colors class, issue #2

The class that converts a name or rgb to hex, hex or name to rgb and rgb
or hex to name. All methods returns string or array (for getRgb method)
or false (if user makes a mistakes; for example put #f1f1f (only 5
letters after #) )
Fixed class

I made fixes, please tell if everything is fine.
Merge pull request #8 from severjason/master

Colors Class