Docs: add perfunctory class and file docblocks and fix existing (#53)

These could do with improvement, but this is a step in the right direction.

* Added file and class docblocks where these were missing.
* Added minimal tags to the existing file docblock of the main plugin file.

tests/bootstrap.php

@@ -1,4 +1,11 @@
 <?php
+/**
+ * Set up the environment for running the unit tests.
+ *
+ * @package WordPress\Plugins\WP_Post_Meta_Revisions
+ * @link    https://github.com/adamsilverstein/wp-post-meta-revisions
+ * @license http://creativecommons.org/licenses/GPL/2.0/ GNU General Public License, version 2 or higher
+ */
 
 $_tests_dir = getenv( 'WP_TESTS_DIR' );
 

tests/test-meta-revisions.php

@@ -1,5 +1,15 @@
 <?php
-
+/**
+ * Unit test file.
+ *
+ * @package WordPress\Plugins\WP_Post_Meta_Revisions
+ * @link    https://github.com/adamsilverstein/wp-post-meta-revisions
+ * @license http://creativecommons.org/licenses/GPL/2.0/ GNU General Public License, version 2 or higher
+ */
+
+/**
+ * Tests for the "Post Meta Revisions" plugin.
+ */
 class MetaRevisionTests extends WP_UnitTestCase {
 
 	/**

wp-post-meta-revisions.php

@@ -1,5 +1,12 @@
 <?php
 /**
+ * Post Meta Revisions, a WordPress plugin.
+ *
+ * @package WordPress\Plugins\WP_Post_Meta_Revisions
+ * @link    https://github.com/adamsilverstein/wp-post-meta-revisions
+ * @license http://creativecommons.org/licenses/GPL/2.0/ GNU General Public License, version 2 or higher
+ *
+ * @wordpress-plugin
  * Plugin Name: Post Meta Revisions
  * Plugin URI: https://github.com/adamsilverstein/wp-post-meta-revisions
  * Description: Post Meta Revisions
@@ -9,6 +16,9 @@
  * License: GPLv2 or later
  */
 
+/**
+ * Class WP_Post_Meta_Revisioning.
+ */
 class WP_Post_Meta_Revisioning {
 
 	/**