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April Update

Some minor enhancements to the core modules. The most significant is a fix the gnocl::list row checking. Previously, if a row was creates with columns less than the total for the list model, then individual cell renderers would not have been created. The fix will check the proposed row length matches that which is expected.


2018-03:
    gnocl::tree, gnocl::list
        o new option -sensitive
    gnocl::list
        o enhanced error checking of item list lengths when adding
          a new row a new row list MUST contain the exact number
          of entries.   
    gnocl::dialog
        o fixed problem with -data option.
    gnocl::text
        o search command no longer requires -tags option to be set,
          returns a list of row col values defining start/end
          positions of search string

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