change reference directory location, user specify where is this DIR, not longer at ./FallInBed/ref/
add one new parameter REF_DIR which is defined the location of reference files
update SNPDictionary.pm. This library uses user defined reference file directory
update annotate.index.snp.pl. use user defined reference directory
use user defined reference directory
update find.neighbors.LDbuddy.pl. use user defined reference directory
remove use FindBin qw(Bin)
update FallInBed.pm. add refDIR as a parameter to find.neighbors.pl find.neighbors.LDbuddy.pl annotate.index.snp.pl calculate.maf.dist.ldnum.pl
update FallInBed.pm. fix the bug, compelet refDIR