Program & library versioning
----------------------------

Program
-------

Simple version like 1.0

Library
-------

Using libtool convention, we define 3 numbers.

When library "natural" version is 1.0 we have:

1:0:0

When we'll release a new API, "natural" version will
be 2.0, and we'll have:

2:0:0

If we release a new implementation of this version 2.0,
without any API change, we'll have:

2:1:1



