Polychrome Versions Save

Bugfix for contrast method

• Updated contrast method to return a polychrome with a valid contrast ratio of 4.5:1 when compared with the original polychrome

• Added more methods to manipulate colors

  mix, spin, and more have been added

• New logo

• Updated documentation

• Adds .setAlpha() to absolutely change the alpha transparency of a `polychrome
• Fixes parsing of hsla and rgba values when there was no leading 0 for the alpha float

Removed ability to depend on global polychrome object. This will more than likely be added back in to a future release.

• Added browser property to package.json to allow for using polychrome as a script include
• Fixed utility methods lighten, fadeIn, and saturate to work on the color "#000" and for colors that have a 0 alpha value