Commit version 4.0.3.
Add missing .gitattributes and .gitignore files.
Update .gitignore to ignore phpStorm.
Code clean-up.
Remove create_function, use __return_null callback instead.
Remove unnecessary closing tag.
Remove invalid span tag around an h2.
Remove unnecessary closing span tags.
Move "Please Note!" to below  h2 to fix flicker.

WP javascript moves any .error to below the first h2.
Beautify Plugins admin page block/unblock messages.
Fix broken donate link.
Use __return_empty_string callback instead of global function.
Remove wpse_38111 global function, use create_function() instead.
Whitespace.
Consolidate plugin meta links into a single filter.
Remove one tab level.
Move CSC enqueueing within class.
Define version const within class.
Fix text domain in plugin header.
Change add_submenu_page capability from administrator to manage_options.

Using the role name is deprecated in WP.