added CREATE/DROP TABLE to install.sql/uninstall.sql
split up into show and edit modes; not finished yet (code crashes)
renamed Utils.php to RichTextPluginUtils.php to avoid name collisions
giving user the option to undo clicking 'cancel' button in edit mode
texts are now stored in and retrieved from the database
using HTMLPurifier to get clean HTML code from user edits
cleaning html text from database, in case someone meddled with that
text is now shown as html instead of showing code with htmlReady()
added editor stylesheet to show text in same style as it is edited
optimized look and feel