relax SVN archive

Changin the Keyboard shortcut for Changing the working directory to Ctrl+W. Since Ctrl+C is often used for copying (from the terminal).

For the 4 autoanalysis methods, the default results directory is now the current working directory instead of the lauch directory.

gui/analyses/auto_model_free.py
gui/analyses/auto_noe.py
gui/analyses/auto_relax_disp.py
gui/analyses/auto_rx_base.py

Updating the self.system_cwd_path when a directory change is observed.

Letting the current working directory be printed in the statusbar in the bottom.

Letting the lib.system.cd function notify the observer, when chanding directory.

Modifying the userfunction system.cd() not to show the result to STDOUT.

Adding an observer for current working directory.

Changing to a filedialog for the userfunction system.cd()

Adding af verbose flag to lib.system.pwd() function.

Adding a toolbar button for changing the current working direxctory.