CHANGES.DBMS File
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v0.2.2 -- 4/1/2017
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Prototype version number changed :
               introduced an initial '0' to become the major version number, to indicate that the software is a prototype,
                 implemented by a changed version number in 'configure.ac';
               incremented the patch number to reflect the bug-fix that now enables the code to run on 64-bit machines.

v2.1 -- 26/12/2016
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* Autotools : deleted 'Makefile.cvs' (CVS not being used) and 'ltmain.sh' (not being used by Autotools;
              updated 'Makefile.in' (re-ran 'Automake'), 'config.h.in', 'configure.ac' and 'configure' (re-ran 'Autoconf');
              added file 'compile'.

v2.1 -- 22-23/11/2016
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* DBMS code : it DOES reference SOME of the moved files, even though it doesn't appear to use them;
              in 'btree.h', amended 'ptrdiff_t' to 'std::ptrdiff_t' to fix type error for 64-bit machines;
              re-instated '#include "STXStack.h"' in 'ExternalInterface.cpp'.
* Repository : moved STX files plus 'btree.h' and 'btree_multimap.h' back to 'RaquelDBMS/Trunk/src' to reflect use of code.
* Autoools : updated 'Makefile.am' to reflect use of code.

v2.1 -- 21/11/2016
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* Autotools : removed references to the files moved to 'StorageStacks' from 'Makefile.am' in 'RaquelDBMS/Trunk/src'.
* DBMS code : removed '#include "STXStack.h"' from 'ExternalInterface.cpp'.

v2.1 -- 17/11/2016
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* Repository : the DBMS code does not appear to use 6 'btree' .h files and 4 STX .cpp & .h files;
               hence created subdirectory 'STX-B+Trees' within 'StorageStacks'; moved these files into it from
                'RaquelDBMS/Trunk/src'.

v2.1 -- 27/9/2016
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* Autotools : renamed 'configure.in' to 'configure.ac' and updated contents; updated 'Makefile.am' in 'RaquelDBMS/Trunk/src'
                subdirectory.

v2.1 -- 1/8/2009
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Prototype completed.