Copy hidden files at top level directory

Hidden files ignored at top level directory due to * vs . passed to
cp command.

Patch by @wallyqs and @JeanSebTr via github pull requests
which got closed and never brought back in.
Merge branch 'missing-hidden-files' of https://github.com/jfarrell/vcap-staging into jfarrell-missing-hidden-files

Conflicts:
	lib/vcap/staging/plugin/play/plugin.rb
	spec/unit/php_spec.rb