Removed 'bare' option from test repository to 
allow checkout tests.

Signed-off-by: Ben Straub <bstraub@github.com>

Also, remove some duplication in the clone test
suite.

git_clone now produces a repo that 
`git status` reports as clean!

Properly handling file modes. Still needs line-
ending transformations.

Now creating a local branch that tracks to the
origin's HEAD branch, and setting HEAD to that.

Also standardized on 3-space indentation. Sorry
about that.

So far they only create a repo, setup the "origin"
remote, and fetch. The API probably needs work as
well; there's no way to get progress information
at this point.

Also uncovered a shortcoming; git_remote_download
doesn't fetch over local transport.

The second call to assert_config_entry_on_init_bytype is cleaned up by
the main cleanup function, but that overwrites the first _repo. Make
sure that one doesn't leak.

The call to repo_init_reinit already takes care of opening the
repository and giving us a git_repository object to give to the
caller. There is no need to call git_repository_open again.

Fix Makefile.emebed for mingw32

Don't need unix/*.c for windows, don't need wildcard for regex.c

Revparse fixup

otherwise we can't compile the native parts of the rugged gem on Windows