Closes #26: new configuration filter: acm_ad_code_args, readme updates, make sure google-adsense conforms to new way

Author: rinatkhaziev

common/lib/acm-provider.php

@@ -29,9 +29,12 @@ function __construct() {
 					'editable'  => true,
 					'required'  => true,
 					),
-				);
-			$this->ad_code_args = apply_filters( 'acm_ad_code_args', $this->ad_code_args );
+				);			
 		}
+		/**
+		 * Configuration filter: acm_ad_code_args
+		 */
+		$this->ad_code_args = apply_filters( 'acm_ad_code_args', $this->ad_code_args );
 
 		// Could be filtered via acm_output_html filter
 		// @see Ad_Code_Manager::action_acm_tag()

providers/google-adsense.php

@@ -38,8 +38,14 @@ public function __construct() {
 		//Since URLs aren't used with AdSense, value 'null' is included as ACM uses parse_url to validate URLs
 		$this->whitelisted_script_urls = array( '%slot%', null );
 
-		//Specify table columns
-		$this->columns = apply_filters( 'acm_provider_columns', array( 'slot' => 'Slot' ) );
+		$this->ad_code_args = array(
+			array(
+				'key'       => 'slot',
+				'label'     => __( 'Slot', 'ad-code-manager' ),
+				'editable'  => true,
+				'required'  => true,
+			),
+		);
 
 		parent::__construct();
 	}

readme.txt

@@ -268,19 +268,24 @@ Example usage:
 		return $columns;
 	}`
 
-= acm_provider_columns =
+= acm_acm_ad_code_args =
 
 This filter comes in pair with previous one, it should return array of ad network specific parameters. E.g. in acm_list_table_columns example we have
-'id', 'name', 'priority', 'conditionals'. All of them except name are generic for Ad Code Manager. Hence acm_provider_columns should return only "name"
+'id', 'name', 'priority', 'conditionals'. All of them except name are generic for Ad Code Manager. Hence acm_provider_columns should return only "name". "editable" and "required" indicate whether this field should be editable and required.
 
 Example usage:
 
-	`add_filter( 'acm_provider_columns', 'my_acm_provider_columns' );
-	function my_acm_provider_columns( $columns ) {
-		$columns = array(
-			'name'           => __( 'Name', 'ad-code-manager' ),
+	`add_filter( 'acm_ad_code_args', 'my_acm_ad_code_args' );
+	function my_acm_ad_code_args( $args ) {
+		$args = array(
+			array(
+				'key'       => 'name',
+				'label'     => __( 'Name', 'ad-code-manager' ),
+				'editable'  => true,
+				'required'  => true,
+			),
 		);
-		return $columns;
+		return $args;
 	}`
 
 == Screenshots ==