relax SVN archive

The read_only=True flag to wizard_elements.Base_value now sets a TextCtrl to the background colour.

The wizard_elements.Base_value.SetValue() method now works properly with the ComboBox.

The wizard_elements.Base_value class now can set the element to be read only.

The wizard page element_string() method now accepts all the combo box args (and a read_only arg).

Created generic_fns.pipes.PIPE_DESC_LIST which is the PIPE_DESC as a list, sorted by VALID_TYPES.

This will be used in the GUI user functions.

Better ComboBox support in wizard_elements.Base_value class.

Now strings and data are separate (if the data is supplied), and the GetValue() method now returns
the client data rather than the string value.

Modified the wizard_elements.Base_value base GUI element class to handle combo boxes.

This class can now choose between a wx.TextCtrl or a wx.ComboBox element with the element_type
keyword arg.

The Bmrb.test_bmrb_rw GUI test now uses the new execute_uf() method for the bmrb.citation uf.

Created the GUI test base method execute_uf() for executing a user function.

This is an interface which will massively simplify the creation of GUI tests, so that they can be
almost the same as normal relax scripts. This will allow for the porting of most of the system test
scripts into GUI tests. This however requires the use of the new wizard page element_*() methods
to create the GUI elements.

The bmrb.citation GUI user function now uses the new wizard page element_*() methods for the GUI elements.