compression tests
Merge commit '33e30a6a0056ab7b8456127108f769dca5b8c3eb' into 0.2_gziptestsmerged
Merge branch 'master' into 0.2_gziptestsmerged
Merge branch 'master' into 0.2_gziptestsmerged
add Axel parallel download test
Revert "add Axel parallel download test"

This reverts commit b8ae02ea748fcc07e0d596e1199bf79110d850fc.
add Axel parallel download test
update README