break richtextbox off into its own project/class/module, after all the bugs are fixed

[RedDragonWebDesign]

For one of the bugs, I'm going to have to keep track of the last input before the current input in a variable. That kind of stuff should be handled by the class, invisible to the user.

Same with fixing the cursor.

[RedDragonWebDesign]

Move parseRichText to richTextBox class