Merge branch 'bp/mediawiki-preview'

Merge branch 'bp/mediawiki-preview'

Add a command to allow previewing the contents locally before
pushing it out, when working with a MediaWiki remote.

I personally do not think this belongs to Git.  If you are working
on a set of AsciiDoc source files, you sure do want to locally
format to preview what you will be pushing out, and if you are
working on a set of C or Java source files, you do want to test it
before pushing it out, too.  That kind of thing belongs to your
build script, not to your SCM.

But I'll let it pass, as this is only a contrib/ thing.

* bp/mediawiki-preview:
  git-remote-mediawiki: add preview subcommand into git mw
  git-remote-mediawiki: add git-mw command
  git-remote-mediawiki: factoring code between git-remote-mediawiki and Git::Mediawiki
  git-remote-mediawiki: update tests to run with the new bin-wrapper
  git-remote-mediawiki: add a git bin-wrapper for developement
  wrap-for-bin: make bin-wrappers chainable
  git-remote-mediawiki: introduction of Git::Mediawiki.pm