Strip leading zeros from decimal values
Optimize output of color values

Useful to manipulate colors in integers in PHP code. But once output,
there really is no difference.  And this:

   #fff

is much more space-efficient than this:

   rgb(255,255,255)

(at least for this example, the former is 400% more efficient)
Better way of expressing multiple units

Also will make it easier to extend this check
Fix bug preventing non 'size' numeric values from being parsed correctly

e.g. 10ms was being parsed as Size:10 String:ms, not Size:10ms
Merge remote-tracking branch 'slusarz/size'

Closes #57 as fixed
Merge remote-tracking branch 'slusarz/color'

Closes #58 as fixed
Fix documentation comment
Merge remote-tracking branch 'slusarz/unit_fix'