Check merge status when merging.

Reports the cimpler/travis-ci status of the pull request before merging
and notifies the user of any pull requests.
Add dev branch.
Remove authentication.

This is already taken care of by the Octokit api.
Use build status instead of 'mergeable'.
Fix spelling.
Fix wording and spacing.
Change variables and methods' names to reflect true meaning.
Fix spelling.
Place 'sha' inside 'if pull' block.

This will guarantee that 'sha' will cause no errors:
If a pull is null, than sha will be referencing null.

Now that it's in the logic block, 'sha' will only be created if a pull
is found.
Move warning messages to generalized function.
Use switch case instead of if statements.
feature: remove double highlight(highlight())

It's highlighted when we print it.
Fix syntatical errors.

Retrieve warning only from stable pull request for 'hotfix merge'.
Highlight only on print.

Sub stable pull info with dev info by swapping out 'stable' with the
dev_branch.
Check if the commit has any statuses to report.

Then, grab the latest one.
Set status to null when no pull request is found.

Warn the user when no pull request is found.
github.rb: Rename method name.

Change `warn_about_commit_status` to `get_commit_status_warning`.
github.rb: Use shift to pull latest state.

This allows me to assign state to the actual state if there are any
elements available or simply set it to the string 'none'.

If the string is 'none', I'll simply warn the user that continuous
integration hasn't been set up.
Merge check-status-on-merge (#90) into master

Check commit status when merging.

Fixes #57.

Reports the cimpler/travis-ci status of the pull request before merging
and notifies the user of any pull requests.

Conflicts:
	bin/feature
	bin/hotfix