Change the width of tabs in TextEdit

TextEdit-with-TabWidth is simply a project to create a copy of OS X"s default text editor, TextEdit, with the added ability to change the width of tabs. I added a field, "Tab Width", at the bottom of the "New Document" tab of the "Preferences" window. Type in a number between 1 and 100 (inclusive) and it will change the width of tabs to that number (in character widths). TextEdit does not apply "New Document" preference changes to already open documents; I could have tried to make the tab width change happen immediately to all open windows, but I decided to keep my changes simple. I only changed two of the source files (as included in Xcode 3.1.4), so I"ll only upload those two.