Clarified documentation to indicate that editlab adds blank cubes to .pvl...

  <brief>Modifies cube labels</brief>

  <description>

    This program will allow the user to modify cube file labels.  Modifications include adding, deleting or modifying

    keywords in a group, adding and deleting entire groups, and adding template files.  Adding a

    group will add a new, empty group to the label, and you will have to rerun the program to add any keywords

    you want in the group individually.  A way around this is creating a template file of groups and keywords you

    would like to add and then adding the template file to the label.  When a group is deleted, all the keywords

    inside the group are deleted also.

      This program is designed to make modifications to various objects and groups found in ISIS

      cube labels, but a .pvl file can also be used. When a PVL is used, an interim processing file

      will be created, which you can later remove. Using either file type, you can add/delete or

      modify keywords in a group (e.g.: 2, 3, 5), or add or remove entire groups (e.g.: 1, 6) within

      the labels. For simplicity's sake, use a template (e.g.: 4) to modify labels, as this makes it

      unnecessary to run the program multiple times when adding new groups. Examples can be found at

      the end of this document.

  </description>

  <category>

       in the dialog box for choosing FROM parameter filenames.

       Fixes #655. Fixes #1084

    </change>

    <change name="Andrew Stebenne" date="2015-04-03">

        Modified the description to indicate that editlab always adds a blank cube to a pvl if one

        isn't present.

    </change>

    <change name="Andrew Stebenne" date="2015-04-24">

        Reworked documentation for clarity.

    </change>

  </history>

  <groups>