This fix adds a missing `isClockwise` property

Without this fix, the isClockwise property is not stored for use in CGPathAddPath.

C.F. https://github.com/cappuccino/cappuccino/blob/master/AppKit/CoreGraphics/CGPath.j#L195

This is a partial fix for #578.
Formatting CGPath.j
Formatting, tighten comparisons.
Merge pull request #1778 from ahankinson/partial-fix-issue578

This fix adds a missing `isClockwise` property
Refs #1778. Store clockwise parameter with right name.

The name has to match what we ultimately use in CGContextCanvas and CGContextVML.