Allow optional prefixing.
Automatically apply prefix when there are multiple sources.

Could be overridden if required by specifying `prefix: false` in
a given source definition.
Merge pull request #53 from adam-vessey/master

Allow optional prefixing.
Added a check option to allow the testing of a Puppetfile
send output to stderr and only trap LoadError
[gemspec] Bump rspec version
Merge pull request #56 from lindenle/master

Added a check option to allow the testing of a Puppetfile
Implement settings framework
[git/cache] Use settings framework to set cache_root
[git/cache] Extract memoization to independent class
Merge branch 'settings_framework'
Remove unused interp mixin
Merge remote-tracking branch 'origin/master'
Merge branch 'master' of github.com:adrienthebo/r10k