Shorter clearer code (35% smaller file), and support for passing random in data-color and data-angle

[TalAter]

Great plugin, I've learned a lot from the tricks you've used here.
Still, I couldn't help myself from refactoring the switch case statement.
The result is smaller, slightly faster, while still (I believe) not sacrificing code readability.

Changes:

• Refactored the switch on angle statement to remove all the repeating code that is the same for all angles, leaving only the difference between the angles inside the switch. This change lowered the filesize from 8.1 kb to 5.3 kb. The only code change here (beside moving lines and deleting the repeating ones), is the addition of the iLimit variable which holds either the width or the height.
• Refactored if blocks that define angle, and shadow color so they are shorter, clearer, and also support passing random as the element's color or angle data-attribute.

[peachananr]

Thanks @TalAter . Will take a look. :)

[TalAter]

Let me know if you need an explanation.

The git diff really makes it look complicated... But the only change I did in the refactor is to move all the repeating code outside the switch, leaving only the code that is different in there. The only thing I added is the iLimit variable which holds either the width or height so that the lines that use either one can be taken out of the switch.