0.4 - Fixed memory leak in tcl_gdbm_fetch reported by Toshio TANGE <t-tange@ats.nis.nec.co.jp>

0.5 - changes from Scott Beasley <jscottb@InfoAve.Com>
	I have made a couple of additions.  The first is a function to
	return the error number or the error text from the gdbm library.
	It looks like:

	set err_nm [gdbm error number]
	or:
	set err_txt [gdbm error text]

	I needed this for a little more error control and recovery in my code.
	The next is a way to change the storage mode i.e. from GDBM_REPLACE to
	GDBM_INSERT and vise versa.  The command to do that has the following
	syntax:

	gdbm writemode replace
	or:
	gdbm writemode insert

	This was needed to save the time of a call to gdbm exists.  Also, the
	gdbm open defaults it to GDBM_REPLACE to keep it backwards compatible
	with the old code.

0.6 - Stubs support (8.0.6 or 8.1.1)

