Add Common External Concerns to This Gem

[chtzvt]

E.g., stdlib/lang/go/bootstrap.rb, with a glob require in plover.rb iff running as a gem and PLOVER_STDLIB_INCLUDE != none.

Class-level includes? E.g. std::import “lang/go/bootstrap”

[chtzvt]

module Plover
  module Std; def self.method_missing(_,_); raise "No stdlib"; end; end
end 


module Plover
  module Std
    def self.import(thing)
      puts thing
    end
  end
end


module Plover
  class MyBuilder
    def initialize
      Std::import "something cool"
    end
  end
end

Plover::MyBuilder.new