Initial Commit
Silence the new GTK+ deprecations

Some of the APIs are required for gedit plugins.
Fix the dialog's to use the correct responses
Fix the FindEntry's text property so it notifies correctly
Fix the Dialog's properties so they notify correctly
Set a default width for the find entry

This forces the dialog to be a decent width.
Cleanup creating the dialog
Bind the match-case and entire-word settings to the dialog
WIP: Implemented Searching and Matching