Mitigate abnormally generated areas

[jamesbradleym]

BACKGROUND:

• Polygon.Area() unexpectedly returned a negative area, turns out Polygon.Area() returns a signed area which some may find confusing.

DESCRIPTION:

• Adds a bool signed = false default parameter to the Area function.
• Polygon.Area() now returns a signed (signed=true) or magnitude area (signed=false)

TESTING:

• Create a Polygon and check Polygon.Area value

FUTURE WORK:

REQUIRED:

• [ ] All changes are up to date in CHANGELOG.md.

COMMENTS:

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This change is 

[andrewheumann]

Just want to make sure @ikeough doesn't have any objections to this change (and folding it as an additional breaking change into 2.0)