Using git remote show instead of git remote get-url

[nsomar]

Using remote show instead of remote get-url.

get-url was introduced in git 2.7, which makes vapor heroku init fail on vanilla git installed on Mac OSX el capitan (mine was 2.6.1).

Note: I couldn't find when remote show was added to git, but its before git 1.5 (Sep 2010)

[loganwright]

@oarrabi works on my end, I'll merge for now. Do you know of an easy way to execute the command without logging to console? It's showing the branches, but what we really want is just a way to tell if heroku is already created.

[nsomar]

I think we can route the STDout to file, and then check the exit code.
When the git remote show XXX is exectured, if XXX is not found the status code will be 1, we can check on that.

Il create an issue on github so we can work on it later, sounds good?
Or do you have another place to track tasks and features (ie trello, jira, etc..) ?

[loganwright]

Sounds good to me, we track w/ Github issues for now, we'll break it out when/if issue tracking becomes too complex.