Add configure check for libofx version 0.7.0 and respective error

[Christian Stimming]

Log Message:
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Add configure check for libofx version
	0.7.0 and respective error message. 

2004-11-22  Christian Stimming  <stimming at tuhh.de>

	* configure.in, README: Add configure check for libofx version
	0.7.0 and respective error message. Update docs. Fixes #159050

Modified Files:
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    gnucash:
        ChangeLog
        configure.in
        README