reorganize _loadChunk to return data instead of a filehandle
reorganize _loadChunk to return data instead of a filehandle

codewarrior0/pymclevel,codewarrior0/pymclevel,arruda/pymclevel,arruda/pymclevel,ahh2131/mchisel,mcedit/pymclevel,mcedit/pymclevel,ahh2131/mchisel