add new feature: online clustering with coreset
#495 Replaced strerror with strerror_r
Add Eigen to source tree
Use internal Eigen
Add MPL2 license for Eigen
Add notes about third-party libraries included in Jubatus
Add binary_feature.hpp to plugin.hpp
Merge pull request #524 from odasatoshi/feature/binary_value

Add binary_feature.hpp to plugin.hpp
Regenerate clients/servers
add mixer option to jubactl (fix #474)
install proxy-related headers only if zookeeper is enabled (fix #517)
Fix typedef and include guard in clustering and  cluster_analysis
Merge pull request #522 from hido/fix_cluster_type_and_include_guard

Fix typedef and include guard in clustering and cluster_analysis
Fix jubatus/util test: refs #467
Merge develop & fix clustering & clusteranalysis idl files
Merge latest develop
#495 change buffer size from 256 to 1024
Stop Travis to install Eigen
Merge pull request #526 from jubatus/conditional-distrib-headers

install proxy-related headers only if zookeeper is enabled (fix #517)
Merge pull request #521 from jubatus/feature/strerror_is_thread_unsafe

#495 Replaced strerror with strerror_r