Some values / options enclosed by single quotes should be escaped

[eihigh]

I found the bug as the title suggests. Some values such as comments, default values should be escaped.

Parsing

create table hoge (id bigint comment 'hoge\'s comment');

should be:

 CREATE TABLE `hoge` (
-`id` BIGINT (20) DEFAULT NULL COMMENT 'hoge's comment'
+`id` BIGINT (20) DEFAULT NULL COMMENT 'hoge\'s comment'
 )

I will make a pull request to fix this issue.