update readme.md with instructions for hooking up private repos

[tjanczuk]

update readme.md with instructions for hooking up private repos

[johnnyhalife]

@tjanczuk I did but as I have other commits (like set_env_vars) I'll give you the markdown in here , is it ok?

## Using private repositories or other hosted-git providers
On the 0.5.0 we've added support for using not only Github open source repos, but its private repositories
and any http-based git repositories too. If you want to take advantage of this feature you need to use the remote url for your repository as follows 

`git clone https://{username}:{password}@github.com/my_very_private_org/my_secret_repo`

Basically this will tell the engine that you're cloning a repository that is private, and
which are the credentials you need to access it. Also the same applies to the **Submodule Applications sample**, as follows

`git azure app --setup dante.com --gitUrl https://{user}:{password}@github.com/my_private_dante`

The same approach applies to BitBucket or any other Hosted GIT that supports https/http.

**DISCLAIMER:** Private repositories work **because GitHub supports basic authentication 
over HTTPS for cloning repositories**. We cannot guarantee that the same approach will work
for your own server or any other provider.

[johnnyhalife]

Using private repositories or other hosted-git providers

On the 0.5.0 we've added support for using not only Github open source repos, but its private repositories
and any http-based git repositories too. If you want to take advantage of this feature you need to use the remote url for your repository as follows

git clone https://{username}:{password}@github.com/my_very_private_org/my_secret_repo

Basically this will tell the engine that you're cloning a repository that is private, and
which are the credentials you need to access it. Also the same applies to the Submodule Applications sample, as follows

git azure app --setup dante.com --gitUrl https://{user}:{password}@github.com/my_private_dante

The same approach applies to BitBucket or any other Hosted GIT that supports https/http.

DISCLAIMER: Private repositories work because GitHub supports basic authentication
over HTTPS for cloning repositories. We cannot guarantee that the same approach will work
for your own server or any other provider.

[tjanczuk]

Thanks! I updated the readme.