* Update to v1.9.3
* Minor plugin header reformatting
* Minor code reformatting (bracing, spacing)
* Change documentation links to wp.org to be https
* Note compatibility through WP 4.0+
* Add plugin icon



git-svn-id: https://plugins.svn.wordpress.org/html-special-characters-helper/trunk@975996 b8457f37-d9ea-0310-8a92-e5e31aec5664