Fix jenerator for jubatus_core
do not expose mixer RPC APIs when running in stanadlone mode (fix #798)
replace from_data with from_datum to be consistent with recommender (fix #564)
fix default number of threads in proxy from 16 to 4
do ldconfig after install jubatus_core
Merge branch 'develop' of github.com:jubatus/jubatus into develop
fix unittest_gtest to run after vnum
Merge pull request #808 from jubatus/fix-798

do not expose mixer RPC APIs when running in stanadlone mode (fix #798)
Merge pull request #810 from jubatus/fix-753

fix default number of threads in proxy from 16 to 4
fix get_diff to print only once (fix #805)
Merge pull request #814 from jubatus/fix-for-vnum

Fix unittest_gtest to run after vnum setup (server)
Merge pull request #815 from jubatus/fix-805

Fix get_diff to print only once (fix #805)
Merge pull request #804 from jubatus/fix-jenerator

Fix jenerator for jubatus_core
Merge pull request #809 from jubatus/fix-564

Replace *_from_data with *_from_datum (server layer)
method signature improvements and style fix
fix typo
Merge pull request #807 from jubatus/add-logger

add log4cxx-based logger (refs #746)
migrate from google-glog to log4cxx-based logger
add log4cxx sample configuration file
add liblog4cxx to pkg-config dependency