resigned from crudUtils.passError() and refactored again poi_category.crud.js
moved helper functions to utils module
refactored CRUD handler for GET; added new function getPoiCollection()
renamed new function
refactored CRUD handler for POST; added new function createPoi()
refactored CRUD wildcard for DELETE; added new function deletePoi()
refactored CRUD wildcard for GET; added new function getPoi()
refactored CRUD wildcard for PUT; added new function updatePoi()
refactored createPoi()
refactored getPoi(), deletePoi() and updatePoi(); added new utils function validatePoiId()
moved columns declaration to config
validation refactoring
moved columns config and removed unused module