0.4 -> 0.5

Documentation corrections. Thanks to sbekman@iil.intel.com. 0.3 -> 0.4

Small bugfixes
0.2 -> 0.3

        Bugs in rendering algorithm corrected (thanks to rami@active.co.il for input)
        External debug control added (you need this only if you are me or 
        you want to know how it works)
0.2     
        First real version on CPAN