Clarify converting an issue to pull request.

Running the example as is will result in a 422 error saying
there's no commits between master and new-feature. This adds a
note saying that you need a new-feature branch that's ahead of
master to run the example.
Fix that typo.
Backtick those branches.
Make steps explicit.
Updated code samples to reflect updating of rest_client gem to its new rest-client name
Fixed second instance of 'rest_client'
Very minor line fix
Merge pull request #227 from cuttooth/master

Updated 'Basics of Authentication' guide to reflect changes to rest_client gem
Use `code` instead of _italics_ for file names
Clarify file name
Give symmetry to emdash
Fix typo
Revert "Use `code` instead of _italics_ for file names"

This reverts commit ca85fd43d14e144e63915efec1929311a858e01d.

See discussion in pull request:
https://github.com/github/developer.github.com/pull/228#issuecomment-14697216
Remove trailing whitespace
Merge pull request #228 from github/tweak-basics-of-authentication-guide

Tweak basics of authentication guide
Merge pull request #226 from rsese/clarify-issue-to-pull-request

Clarify issue to pull request
Remove "pushed" element from user search response

The API does not include this element in the response.
Fix timestamps in search responses

Timestamps are returned in UTC.
Update user email search results to reflect reality
Update user keyword search results to reflect reality