Added basic CodeEditor interface
Added basic plain editor
Added a few things to ICodeEditor and fixed tabbing on plain
Added detection of changed paragraphs
Changed tabbing to use margins. Yay free indent on wrap!
Added support for new-line indenting and autoindent placeholder
Implemented some properties
Forgot the reformatting guard
Added tab size changing with font size
Added load/save support to plain. Basic features finished
Removed a cow line