add bsearch.h
add Makfile
add bsearch.c( test )
add test.c
test.c correct the order of para of bsearch in test_1
test.c: keyindex->keyinlist
bsearch.c: keyindex->keyinlist
bsearch.c: compare key with first and last key in list
bsearch.c: add bsearch_iter format
bsearch.c: finished
josephus: chain, algo, common.h, test.c, makefile
Merge 'algorithm/josephus'
add comments
Merge 'algorithm/bsearch'