Call register_label when train method does not change state of storage, and return labels whose scores are zero
add clustering_test.cpp
revision should be initialized
add clustering_test.cpp
SetUp() in test should do SetUp repeatedly
parametized test must be used via TEST_P
add do_clustering() test
test `get_nearest_center`
add test for `get_nearest_members`
Check existing IDs when loading model file for jubaanomaly
Fix build error with zookeeper
Use pair instead of shared_ptr of pair in test
Remove code for benchmark
Remove csize_t
Use std::abs instead of ::abs : fix #663
Reformat clustering
Fix code style
Make inp method pure virtual
Merge pull request #664 from jubatus/remove-abs

Use std::abs instead of ::abs : fix #663
Add labels to stub_storage to maintain all labels