Add sp_spec CPT for Event Specs

a) Create sp_spec
b) Add it to Config Page
c) Add Admin Meta-Box
d) Add Event Meta-Box

includes/class-sp-event.php

@@ -707,4 +707,24 @@ class SP_Event extends SP_Custom_Post{
 	public function sort_timeline( $a, $b ) {
 		return $a['time'] - $b['time'];
 	}
+	
+	/**
+	 * Returns formatted event specs
+	 *
+	 * @access public
+	 * @return array
+	 */
+	public function specs( $neg = null ) {
+		$specs = (array)get_post_meta( $this->ID, 'sp_specs', true );
+		$spec_labels = (array)sp_get_var_labels( 'sp_spec', $neg, false );
+		$data = array();
+		
+		foreach ( $spec_labels as $key => $value ):
+			$spec = sp_array_value( $specs, $key, null );
+			if ( $spec == null )
+				continue;
+			$data[ $value ] = sp_array_value( $specs, $key, ' ' );
+		endforeach;
+		return $data;
+	}
 }