Convert the expression parser over from saving persistent data as a

[David Hampton]

Log Message:
-----------
Convert the expression parser over from saving persistent data as a
scheme fragments to saving it in a glib key/value file.

Tags:
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gnucash-gnome2-dev

Modified Files:
--------------
    gnucash:
        ChangeLog
    gnucash/src/app-utils:
        Makefile.am
        gnc-exp-parser.c