relax SVN archive

Fix for the file selection widget in the user function windows - the file type is now not hardcoded.

The code was copied from the script user function window so that the filetype was hardcoded to *.py!!!

Rewrote the free format file settings window.

This now uses a base class for settings windows and the user function base class to supply the
central part of the window.

Removal of the unused gui_bieri.analyses.project module.

This old code is not used and has no use in the current GUI.

The free file format widget now has a save button to store the contents in the relax data store.

The settings menu and user function windows can now talk to each other.

Fix for the path of the 22x22 view-refresh icon - this is an oxygen icon, not a relax one!

Added the oxygen document-save icon for the 22x22, 32x32, and 48x48 resolutions.

The initial values of the free file format widget are now those in the relax data store.

This means that values set in the menu now appear in the user function windows.

Changed the ds.relax_gui.file_setting data structure to be a container class.

The structure is now called ds.relax_gui.free_file_format and it is a container with variables for
each column type and the column separator.

Removed some unused imports.

Added the sequence.read user function window and menu entries.