Update README.md

Correct name of ruby file, report.rb --> gitflow-repo-report.rb
Remove trailing spaces
Make trailing slash optional in routing urls
Use grit instead of git gem

Remember to run Using diff-lcs (1.2.4)
Using mime-types (1.25)
Using posix-spawn (0.3.6)
Using grit (2.5.0)
Using rack (1.5.2)
Using rack-protection (1.5.0)
Using tilt (1.4.1)
Using sinatra (1.4.3)
Using bundler (1.3.5)
Your bundle is complete!
Use `bundle show [gemname]` to see where a bundled gem is installed. to enable the change.
Enable listing local repo

Use the /view/gitflow-repo-report route.
The repo needs to be located at ~/dev/gitflow-repo-report.
This is temporary to be able to play around with gist.
Identifying the name of a repo seems to be a problem,
so I am using the name argument of the load function.
Update README.md

Add instructions for using shotgun and gist, and how to display a repository's branches
Rename instance variable to improve semantics
Display repo name together with branch name
Merge pull request #4 from emilwall/master

Use grit to display information about local repos