Remove out-of-bound access to vectors.
Add a build option for sanitizer.
Merge pull request #25 from gwtnb/remove-out-of-bound-access

Remove out-of-bound access to vectors.
make parameter name consistent with config parameter
add vnum
Merge pull request #29 from gwtnb/fsanitize

Add a build option for sanitizer.
remove meaningless call of get_all in clustering (fix #28)
remove unused tools
Merge pull request #40 from jubatus/fix-28

remove meaningless call of get_all in clustering (fix #28)
Merge pull request #38 from jubatus/fix-param-name

make parameter name consistent with config
Merge pull request #39 from jubatus/add-vnum

add vnum