Install files starting with '.' (Fixes #680)

The '*' pattern doesn't match files starting with '.' unless you
use File::FNM_DOTMATCH.  Some gems depend on files starting with
'.' being installed.  Excluding files starting with '.' was not
the intention of the author that added the fnmatch code.
Merge pull request #681 from jeremyevans/master

Install files starting with '.' (Fixes #680)