relax SVN archive

The 'File->New analysis' menu entry now creates a notebook and adds the analysis tab.

This is currently hardcoded to a model-free analysis tab until a wizard is made. The initial sizer
with the relax icon is replaced by a new one containing the notebook. The new method add_analysis()
adds a tab of the appropriate analysis to the notebook.

Removed the 'new analysis' button from the main GUI window - it was too ugly!

The new() method now deletes the contents of the main sizer.

Improvements to the 'new analysis' button.

Merged revisions 13028-13029 via svnmerge from
svn+ssh://bugman@.../svn/relax/1.3

........
r13028 | bugman | 2011-06-15 10:52:36 +0200 (Wed, 15 Jun 2011) | 3 lines

Added larger versions of the document-new.png Oxygen icons.
........
r13029 | bugman | 2011-06-15 10:53:44 +0200 (Wed, 15 Jun 2011) | 3 lines

Added the new document-new icons to the paths module.
........

Created a start screen for the GUI rather than having a empty grey main window on startup.

Added the new document-new icons to the paths module.

Added larger versions of the document-new.png Oxygen icons.

Renamed the file menu entries to 'File->Open relax state' and 'File->Save relax state'.

The open entry has been grouped with the save entries as well.

Added a new menu entry 'File->New analysis'.