issue #201: rpc_server: separate listen and starting rpc-threads
Accept cast from integer to float
apply fixed name of methods (refs #203)
fix client symbol conflicts (fixes #84)
add shebang to generate_clients.py
change tmpdir to datadir (fixes #198)
Fix graph parameter and test
Merge pull request #219 from unnonouno/feature/float-int-conversion

Accept cast from integer to float
rpc_server::close() added to stop listening port
update package utility for 0.4.0
Eliminate unused <pficommon/network/mprpc.h> header includes and some fixes
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