Link to platform-samples repo
Fix grammar gotcha
Clarify sentence
Ubiquitous language: Replace 'calls' with 'requests'
Wordsmith all the things
Expand prose re: getting your user profile
Clarify "limited access" description

You cannot specify what access a token provides; you either grant the
token to the third party app or you don't.
Wordsmith the web flow introduction
Separate request from response
Wordsmith more of the things
Use consistent syntax for placeholders

Elsewhere we use angle brackets for placeholder values. Let's use them
here as well.
Wordsmith even more of the things
Incorporate @gjtorikian's suggested edits
Merge pull request #225 from github/tweak-getting-started-guide

Tweak "Getting Started" guide