add ruby-version
add gemset
update specs to 3.0

* set coverall
* set codeclimate
add badges of service code tools
automatic detect gs path
remove ruby 1.8.7 support
update require spec_helper
uft-8 for ruby 1.9
fixed rghost in 0.9.3 because a bug in 0.9.4
bump up version to 3.2.0