Prior to this commit, the puppet strings project was using require_relative
to include other classes and modules. Due to some ambiguity and the fact
that the strings project shares some naming conventions with YARD, the
use of require_relative sometimes made it unclear what was being
included and where it was coming from. Now require is being used and although
this requires the full path, it makes it very clear where things are coming
from.
Refactor the actions module so that it is a class. This is important
because it allows us to keep `Puppet[]` calls out of the library and
have them in the face itself. Additionally, move a few things around
(like `check_required_features` since it makes require statements
cleaner) and clean up some comments.
Refactor the code in the strings face and extract much of the functionality
into a separate library in order to make the code more readable and
sustainable. Additionally, remove the `modules` action from the face
since it does not have a clear use case currently. However since the `server`
action depends on it, and it may be helpful to add other features in the future,
extract the functionality previously contained in `modules` into a helper
method.
Prior to this commit, the handlers and code objects which dealt with
puppet functions were referred to as `FutureParserFunctions` and
`ParseFunctions`. This naming convention will not make very much
sense going forward when the future parser becomes the primary
parser. Therefor, rename `FutureParserFunctions` to `Puppet4xFunctions`
and `ParserFunctions` to `Puppet3xFunctions`.