make install ruby more similar to install_chef. allow user to opt out of the checks
Create cache/ directory under roundsman_working_directory

Some cookbooks uses cache directory for downloading archives.
but roundsman does not create it on initialize,
then chef got failures on first execution.
Merge pull request #11 from tk0miya/create-cachedir

Create cache/ directory under roundsman_working_directory
Merge pull request #10 from ping4/skip_ruby_checks

skip chef/ruby checks
add missing json dependency
make roundsman work on 1.8.7 again
Bump version to 0.1.1
install_ruby? needs to be available outside the namespace
Merge branch 'master' of https://github.com/iain/roundsman