rename no-new-array rule to no-array-constructor; ref #501
fixes #501: no-array-constructor recognises CallExpression form
fixes #500: no-array-constructor should not flag 1-argument construction
document no-array-constructor rule
Merge pull request #507 from michaelficarra/GH-501

Fix: fixes #501 and #500: no-new-array should recognise CallExpression form of Array constructor