== Dir#multiglob

Dir#multglob is like Dir#glob but it can handle more than one match
parameter at a time.

Given a directory 'multiglob' containing:

  A.txt
  A/B.txt
  A/B/C.txt

We can use #multglob to find multiple matches.

  require 'facets/dir/multiglob'

  x = %w{
    multiglob/A
    multiglob/A.txt
  }

  r = Dir.multiglob('multiglob/A', 'multiglob/A.*').sort

  r.assert == x

== Dir#multiglob_r

Dir#multiglob_r is like #multiglob but automatically searches
directories recrusively.

  x = %w{
    multiglob/A 
    multiglob/A/B
    multiglob/A.txt
    multiglob/A/B.txt
    multiglob/A/B/C.txt
  }.sort

  r = Dir.multiglob_r('multiglob/*').sort

  r.assert == x

