[Coin-lpsolver] Change to versioning

[John J Forrest]

I have found myself making lots of changes with very little movement in 
the version number of Clp.  So I have decided to make it easier for users 
to know there are stable versions around.  I may eventually have a stable 
and unstable tree but my current solution is as follows.

The current stable version is 1.01.01.  The last two digits will change 
whenever I think I have a new stable version and the middle two digits 
will change when a noticeable improvement has been made.  If you want the 
latest version which is 1.01.01D (for Development) you need do nothing 
new.  This development version has changes to use Benjamin Hummel's 
CoinFileIO improvements.

If you want version 1.01.01 (or subsequent versions) at any time go to 
COIN/Clp and do

make restore

This gives a list of possible Clp tar files - at present the only one is 
Clp_1.01.01.tar.gz.  If you follow the instructions you will overwrite 
your Clp and Coin files and some Makefiles so that you can do a make 
unitTest to go back to that version.

These tar.gz files also have a copy of COIN/Makefiles directory.  This is 
not restored by make restore but it means that these tar files are a self 
contained copy of Clp.  So going to a clean directory and doing tar zxvf 
Clp_1.01.01.tar.gz you can build Clp.

If you wish to keep a copy of Clp you can also create your own versions by 
make backup 1.01.01_my_copy.

John Forrest
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