formated log message
add log message
 * failed to start
modify exception message
* keeper could not find any servers
modify save/load function's log
 * use jubatus::exception::error_file_name to print file path
 * print message instead of only e.what()
add start message for save/load functions (fixed #195)
modify server's log messages
 * failed to start
format server's log
 * add debug log to insert/update/remove operation.
 * move clear function's log to last of method.
 * add name to clear function's log.
 * and more...
fixed typo
move set_config log to end of method
commonize log (anomaly)
print contents of configuration
print bind address on booting
add load config message
modified messages
fixed typo
remove bind address from booting message
merge 2lines FATAL logs
remove unnecessary std::cout
Merge branch 'feature/log' into develop