Extend Style/MethodCallParentheses to police method calls with arguments

[Drenmi]

So far, this cop just checks that we're not using redundant parentheses for method calls without arguments. We should extend this to allow enforcing parentheses for method calls with arguments.

This would need to exclude method calls made from within a constant body (e.g. attr_reader) and common "keyword" methods (e.g. puts), and potentially be configurable to always omit parentheses. (The last part is a bit harder, since sometimes that produces ambiguous code.)

Example:

foo :bar, :baz

should generate an offense and be corrected to:

foo(:bar, :baz)