Patch from Chris Shoemaker to add a sprinkling of 'const' keywords to

[David Hampton]

Log Message:
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Patch from Chris Shoemaker to add a sprinkling of 'const' keywords to
Account accessor function arguments.

Tags:
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gnucash-gnome2-dev

Modified Files:
--------------
    gnucash:
        ChangeLog
    gnucash/src/app-utils:
        gnc-ui-util.c
    gnucash/src/backend/file:
        io-example-account.c
        io-gncxml-v2.c
    gnucash/src/engine:
        Account.c
        Account.h