First pass at "fields". Fields are a just a wrapper method for regist…

…ering both a control and setting. This is a little easier to use than registering both a control and setting separately. This will only work when you have a single setting tied to a control. Controls with multiple settings would need to use the normal system.

This commit introduces the `register_field()`, `unregister_field()`, `get_field()`, and `field_exists()` methods for the `ButterBean_Manager` class.

inc/class-manager.php

@@ -237,6 +237,22 @@ public function register_setting( $setting, $args = array() ) {
 			$this->settings[ $setting->name ] = $setting;
 	}
 
+	/**
+	 * Register a control and setting object.
+	 *
+	 * @since  1.0.0
+	 * @access public
+	 * @param  string        $name
+	 * @param  object|array  $control  Control object or array of control arguments.
+	 * @param  object|array  $setting  Setting object or array of setting arguments.
+	 * @return void
+	 */
+	public function register_field( $name, $control, $setting ) {
+
+		is_object( $control ) ? $this->register_control( $control ) : $this->register_control( $name, $control );
+		is_object( $setting ) ? $this->register_setting( $setting ) : $this->register_setting( $name, $setting );
+	}
+
 	/**
 	 * Unregisters a section object.
 	 *
@@ -279,6 +295,20 @@ public function unregister_setting( $name ) {
 			unset( $this->settings[ $name ] );
 	}
 
+	/**
+	 * Unregisters a control and setting object.
+	 *
+	 * @since  1.0.0
+	 * @access public
+	 * @param  string  $name
+	 * @return void
+	 */
+	public function unregister_field( $name ) {
+
+		$this->unregister_control( $name );
+		$this->unregister_setting( $name );
+	}
+
 	/**
 	 * Returns a section object.
 	 *
@@ -318,6 +348,24 @@ public function get_setting( $name ) {
 		return $this->setting_exists( $name ) ? $this->settings[ $name ] : false;
 	}
 
+	/**
+	 * Returns an object that contains both the control and setting objects.
+	 *
+	 * @since  1.0.0
+	 * @access public
+	 * @param  string  $name
+	 * @return object|bool
+	 */
+	public function get_field( $name ) {
+
+		$control = $this->get_control( $name );
+		$setting = $this->get_setting( $name );
+
+		$field = array( 'name' => $name, 'control' => $control, 'setting' => $setting );
+
+		return $control && $setting ? (object) $field : false;
+	}
+
 	/**
 	 * Checks if a section exists.
 	 *
@@ -357,6 +405,19 @@ public function setting_exists( $name ) {
 		return isset( $this->settings[ $name ] );
 	}
 
+	/**
+	 * Checks if a both a control and setting exist.
+	 *
+	 * @since  1.0.0
+	 * @access public
+	 * @param  string  $name
+	 * @return bool
+	 */
+	public function field_exists( $name ) {
+
+		return $this->control_exists( $name ) && $this->setting_exists( $name );
+	}
+
 	/**
 	 * Returns the json array.
 	 *