install with bash function
create /var/run/ directory

/etc/init.d/growthforecast: line 37:
/var/run/growthforecast/growthforecast.pid: No such file or directory
add uninstall script
Merge branch 'master' of https://github.com/y-ken/growthforecast-quick-install
set env PERLBREW_HOME
add bash function install_growthforecast
update README