Add Custom Search Feature
*the search function convert post array into get array and insert it into database called "query array",
*the function that generates "query array" will be returning the ID for respective query to be used as criteria in generating get array
*if no search criteria submitted, the search will be returning all data
*the ID of "query array" will be included in the url for pagination to work well
*modify core input class of system in order to be able to convert post array into get array
*modify form helper in order to make the search criteria repopulates while the search returning the search result
Add table schema of ci_query
*Import this schema to have search function of day17 work