Fixes crash when trying to cast . into floats

The bed file being used had . in the score column, which made the
float() angry. This is just a quick/bad hack of make it shut up fix to
make any . turn into 0 instead, who really knows if that is the score
one wants or if really it would be better to have no score in that case,
probably no score, but what can you do these days with the kids and
their cellphones
Merge pull request #5 from oklasoft/fix_bed_score_parsing

Fixes crash when trying to cast . into floats