Merge pull request #5 from preflightsiren/rspec-tests

Rspec tests
Merge branch 'master' of https://github.com/preflightsiren/puppet-bind into temp
Cosmetic fixes
New params class, minor/cosmetic cleanups and update README
bugfix, puppet cannot find bind9 init script

the path param in service resources behaves differently from exec
resources, resulting in the service not being able to start/restart the
bind9 service