revert accidentally downgraded ruby version
add munin-node
explicitly set default perl version

required by new USES=perl5 as the default version in master is not 5.14
Revert "explicitly set default perl version"

wrong tree to commit.

This reverts commit ba1f96e5f9e6c18a873dd451bec5e83866f07b63.
Merge branch 'master' of github.com:reallyenglish/reallyenglish-tinderbox-scripts