* the TxnMgr is invoked by the editor via nsRepository
* editor.h|cpp have been renamed nsEditor.h|cpp for consistency
* editorInterfaces.h|cpp have been renamed nsEditorEventListeners.c|hpp
* added nsITextEditor.h, nsTextEditor.h|cpp. The text editor is a placeholder for the rules unique to text
editing. It invokes the nsIEditor to do core editing operations.
* reworked nsIEditor and related interfaces as per emerging design.
* nsEditor::BeginTransaction and EndTransaction call nsTransactionManager::BeginBatch and EndBatch.
external interface for selection (to be IDL-ified later).
Fix some editor bugs:
- Advance the cursor on text insert (so text is inserted in the right order)
- Make DeleteSelection in the editor call the actual selection
- Make DeleteSelection update the frames' notion of the selection
* added DeleteSelection to editor. Doesn't work very well yet because selection is giving me random offsets into text content.
* lots of work in the various transactions.