added 32 x 32 tile bitmap + name fixes

vgalte ta sxolia pou prepei  stous orismous kai sth draw_region gia na
to deite thn o8onh me 32x32 tiles, fainetai polu cool se megalh o8onh.
Xlwmo na th xrhsimopoihsoume afou den xwraei se o8onh lap top kai einai
mallon adunato ta sourceX/Y twn renctagle twn sprites na einai akrivws
ta *2 twn sprites pou exoume twra  an diplasiasoume thn pic twn sprites
.