Add Filter library

Filter Request Inputs
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This library filter `$_GET` and `$_POST` arrays. 

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Add filter folder to BASE_PATH/cliprz_system/libraries/
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Add in BASE_PATH/cliprz_application/config/libraries.php
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cliprz::library_use('filter', 'filter'); 

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How to use it
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	/**
	 * functions get, post, filter.
	 *
	 * param 1. Field name (value in filter function)
	 *       2. filter type
	 *
	 * typs int, text, email, number, url
	 */
	
	$id = cliprz::library('filter')->get('user_id', 'int');
	
    $name = cliprz::library('filter')->post('username', 'text');
    
    $email = cliprz::library('filter')->post('email', 'email');
    
    $price = cliprz::library('filter')->get('item_price', 'number');
    
    $url = cliprz::library('filter')->filter('http://google.com', 'url');