Stable, SWIG exported API

Since version 0.2 ExactImage includes script binding generated through SWIG. This API is supposed to be stable and if changes are done backward compatibility is guaranteed to be preserved.

We decided to be that strong with the external API stability even in this early stage of development, because ever changing APIs just annoy any serious programmer away and ExactImage is deployed in production solutions by partner companies.

Incrementally over version 0.3, and 0.4 the external API was extended with functionality as required by partner companies and build for the Perl language by default.

Since version 0.5 ExactImage comes with built-in support to generate not only the Perl, but additionally PHP, Python and Lua laguange bindings - if the specific language support is detected and requested during configuration.

In the future we will provide API documentation at this place as well as in-depth introduction and examples.