Added cdsParser

cdsParser is a function to read in a .cds file from a OH project
archive.  .cds files are made with ConfigObj and can store notes on
changes/sources for each catchment descriptor
new guid_data_obj

New object is to store modeller notes, choices etc within the gui.  Many
things will saved within dictionaries to accelerate writing to file via
ConfigObj
project_file

Functions for saving and loading OH project archives using ConfigObj
No changes to code, just within notes