migrate from google-glog to log4cxx-based logger
add log4cxx sample configuration file
add liblog4cxx to pkg-config dependency
add liblog4cxx10-dev to travis config
fix logger to abort on FATAL log
fix include headers and pass cpplint
fix travis config to use proper branch
remove glog dependency from ux_splitter
remove glog dependency in generated code from jenerator
regenerate servers
remove glog from travis config
add missing headers
Merge pull request #821 from jubatus/migrate-logger

Migrate from google-glog to log4cxx