Move classifier_serv to core::classifer
Eliminate old code
Move regression_serv to core::regression
Move recommender_serv to core::recommender
Move stat_serv to core::stat
fix code style
Merge branch 'feature/jubacore' of github.com:jubatus/jubatus into jubacore
Move anomaly_serv to core::anomaly
fix anomaly build error without --enable-zookeeper
Move graph_serv to core::graph
changed: core::anomaly::add() receive id instead of idgen
Remove server header dependencies

linear_function_mixer, mixable_weight_manager and diffv
moved to core from server.
Merge branch upstream 'develop' into feature/jubacore

Conflicts:
	src/regression/regression_factory.cpp
	src/server/anomaly_serv.cpp
	src/server/graph_serv.cpp
	src/server/recommender_serv.cpp
	src/server/stat_serv.hpp
	src/stat/mixable_stat.cpp
	src/stat/mixable_stat_test.cpp
Eliminate unsed code
Merge branch 'jubacore' into develop

fixes #264