Allow "new expressions" also for general type names.

Breaking change: If you want to send value with a contract creation, you
have to use parentheses now:

`(new ContractName).value(2 ether)(arg1, arg2)`

libsolidity/parsing/Parser.cpp

@@ -939,7 +939,7 @@ ASTPointer<Expression> Parser::parseLeftHandSideExpression(
 	else if (m_scanner->currentToken() == Token::New)
 	{
 		expectToken(Token::New);
-		ASTPointer<Identifier> contractName(parseIdentifier());
+		ASTPointer<TypeName> contractName(parseTypeName(false));
 		nodeFactory.setEndPositionFromNode(contractName);
 		expression = nodeFactory.createNode<NewExpression>(contractName);
 	}