Release urgent feature 2.7.0 in response to request from user @grflukas.

https://wordpress.org/support/topic/multiple-reference-containers-in-single-post/
Bundled with two bugfixes.
https://github.com/markcheret/footnotes/issues/65
https://github.com/markcheret/footnotes/issues/71
Last release directly to SVN.
= 2.7.0 =
- Adding: Reference container: optionally per section by shortcode, thanks to @grflukas issue report.
- Bugfix: Excerpts: make excerpt handling backward compatible, thanks to @mfessler bug report.
- Bugfix: Dashboard: debug the 'Quick start guide' tab, thanks to @rumperuu bug report.

git-svn-id: https://plugins.svn.wordpress.org/footnotes/trunk@2515217 b8457f37-d9ea-0310-8a92-e5e31aec5664

footnotes.php

@@ -4,8 +4,8 @@
  * Plugin URI: https://wordpress.org/plugins/footnotes/
  * Description: time to bring footnotes to your website! footnotes are known from offline publishing and everybody takes them for granted when reading a magazine.
  * Author: Mark Cheret
- * Package V.: 2.6.6
- * Version: 2.6.6
+ * Package V.: 2.7.0
+ * Version: 2.7.0
  * CAUTION: THIS V. FIELD IS PARSED FOR UPDATE CONFIGURATION.
  * Author URI: https://cheret.org/footnotes/
  * Text Domain: footnotes
@@ -16,14 +16,14 @@
 /**
  * Package Version number for stylesheet cache busting.
  *
- * Please keep this string in sync with the PACKAGE Version ('Package V.').
- * Please mirror the 'Version' (NOT 'Package V.') in js/wysiwyg-editor.js.
+ * Please keep this string in sync with the 'Version' (not 'Package V.').
+ * Please mirror the 'Version' also in js/wysiwyg-editor.js.
  * @since 2.1.4
  * @since 2.5.3 (Hungarian)
  * @var str
- * @lastmodified 2021-04-13T1011+0200
+ * @lastmodified 2021-04-14T2351+0200
  */
-define( 'C_STR_PACKAGE_VERSION', '2.6.6' );
+define( 'C_STR_FOOTNOTES_VERSION', '2.7.0' );
 /**
  * Enables toggling the stylesheet enqueuing mode from production (true) to development (false).
  * @see Full docblock below next.