[or]operator is deprecated in ocaml4
Merge pull request #512 from kumagi/master

hotfix: [or] operator is deprecated in ocaml4
Merge branch 'release/0.5.0'
Remove dependency to javassist
re-enable gcc and master test in Travis CI (related #120)
Add option to disable Eigen: fix #542
Add a blank line for readability
Improve get_status
Delete join
Remove default value of mixer
Merge branch 'develop' into option-disable-eigen
Do not install Eigen if disabled
disabling mix if parameter 0 is given
Add test for zk; read more than 1kiB data
Modify buffer size to 1MiB
Fix zk::read against data being NULL
Use zoo_exists in zk::read to get buffer size
Fix zk::read against data being empty
Fix error message for zk::read
Rewrite zk::read as loop