[fix] Fix #70 boolean value errors
[feature] Add ORDER BY FIELD feature
update README.md

gave it a little `zing` to the markdown
[feature] #78 Support more complex relativity condition
[feature] Better info output
[feature] Add comment support for root relativity condiction
[feature] Add support of JSON encoding for insert and update
[fix] Code optimize
[fix] #86 add support datetime for max and min
[fix] Relativity condition conflict with ORDER
[fix] Relativity condition bug
add support for empty constructor
[feature] #87 Add table joining feature for select based queries
[fix] Coding style fix for #88
[fix] Code optimize
[feature] Add support for NOT Between
[fix] Change where_clause fn as protected
[feature] Add support for Oracle database
[fix] Fix has() bug
[fix] Bug fix for #87