`delete_label` should return true when succeed to delete
check `pkg-config` only when debug-mode
Merge pull request #1 from jubatus/debug/delete_label_should_return_true_when_deleted

`delete_label` should return true when succeed to delete
Eliminate TODO comment and unnecessary line
`delete_label` should return true when succeed to delete
use assertion for range check in get_row(id, packer)
Remove paramters for unlearner from lof_config
implement sticky_pattern option in unlearner
fix missing serializer for except member in binary_rule
replace from_data with from_datum to be consistent with recommender (fix #564)
Merge branch 'develop' of github.com:jubatus/jubatus_core into develop
Fix wscript for adding version number to .so
Merge pull request #3 from jubatus/remove-lof-unlearning

Remove paramters for unlearner from lof_config
fix unittest_gtest to run after vnum
fix to regexp libraries can be disabled (fix #645)
Merge pull request #7 from jubatus/fix-for-vnum

Fix unittest_gtest to run after vnum setup (core)
both of anomaly algorithm should support add()
classifier_test is duplicated, one of them must be classifier_factory_test
Merge pull request #5 from jubatus/fix-792

Add missing serializer for except member in binary_rule
Merge pull request #6 from jubatus/fix-564

Replace *_from_data with *_from_datum (core layer)