Support indexing local directories (without supported VCS)

[KindDragon]

I want use Hound as https://github.com/google/codesearch/ for my local directory with code (it subdirectory of my TFS repository)

Also fix README.md, file:// protocol doesn't work with any folder

Use the file:// protocol. This allows you to index any local folder, so you can clone the repository locally and then reference the files directly. The downside here is that the polling to keep the repo up to date will not work.

[jklein]

We should probably just detect if the file://protocol is being used and bypass the VCS code entirely, just indexing the repo.

[aidansteele]

@jklein I opened up a PR that hopefully addresses this issue: #138.

[jamime]

Same issue here. I want to index my already checked out SVN repo.

[rkachowski]

This would be great - I have a huge mercurial repo with the largefiles extension already checked out that i'd like to be able to index directly

[lukehsiao]

Indexing local directories would be a great feature. Is there any way to workaround this while the PR is being updated?

[xdsv]

+1 on local directories