Smultron specifications

Added localisations (Swedish, French and German).
.Mac synchronisation of the preferences.
Added a Open Recent Project-menu.
Added option to automatically open all documents that were open the last time Smultron was closed.
Improved the syntax colouring.
One can now replace with an empty string in Advanced Find, i.e. delete.
Added option to colour multi-line strings.
Now sets the insertion point to the same colour as the text.
Now guesses the syntax definition from the contents of the first line if there isn't an extension.
Added syntax definitions (PDF, LaTex and Objective Caml).
Many other improvements and some bugfixes.