Will take an input alignment, read it in using Biopython, split the alignment into 50% overlapping subalignments, and output each subalignment to a separate file that has been named with the alignment coordinates (assuming that it is a whole genome alignment, position 1 will be the first nucleotide and the highest value will be the last nucleotide - NB: CHECK THIS IF INPUTTING A SNP ALIGNMENT AS THE COORDINATES WILL LIKELY NOT MAKE SENSE) and alignment length in the output format the same as the specified input format.