RENAME keyword
Rename existing crystals, project and dataset names

Syntax: RENAME CRYSTAL <xname> [TO] <new_xname>
	RENAME DATASET <dname> [IN <xname>] [TO] <new_dname>                   
	RENAME PROJECT <pname> [IN <xname>] [TO] <new_pname>

*** The "IN" construct should only be used if <dname> isn't the full
    path ***

NEW keyword
Make a new crystal or dataset

Syntax: NEW CRYSTAL <xname> CELL <a> <b> <c> <alpha> <beta> <gamma>
        NEW DATASET <dname> IN <xtal> WAVELENGTH <lambda>

*** Would be good to also have e.g. NEW CRYSTAL xtal1 CELL FROM xtal2

ASSIGN keyword
Assign datasets to crystals, columns to datasets */

Syntax: ASSIGN DATASET <dname> [IN <xname>] [TO] <xname0>
	ASSIGN COLUMN <col> [IN [<xname>/]<dname>] [TO] [<xname0>/]dname

GENERAL SYNTAX

CELL a b c alpha beta gamma

CRYSTAL <xname> | XNAME <xname> | /<xname>

DATASET <dname> | DNAME <dname> | /<xname>/<dname>

COLUMN <label>  | <xname>/<dname>/<label>

