Improve error message for generic type names that are missing "of"

[Chuck]

class X

	def main is shared
		d = Dictionary<int, int>()  # error: Expecting an expression.
		t = List<int>()  # error: Expecting an expression.

The error message should instruct the user that if they are naming a generice, then they are missing "of".

Also, catch this problem in declarations such as inherits List<int> and def foo as List<int>

[hopscc]

related situation on ticket:337