add test for union update of vkmerlist
fix bug of unionUpdate() of vkmerList
use assert in test case for testUnionUpdate
complicated test
modify complicate test
perfect test for UnionUpdate() for vKmerList
Merge pull request #84 from uci-cbcl/nanzhang/TestUUpdate_VkmerList

add test for union update of vkmerlist
Merge branch 'genomix/fullstack_genomix' into anbangx/clean-code