Improve formatting of #App Examples - capitalisation, periods etc
Improve formatting of #App Examples - capitalisation, periods etc

Has consistent formatting and proper spelling/grammar.
The link and description are separated by a dash. 
Example: - [AVA](…) - JavaScript test runner.
The description starts with an uppercase character and ends with a period.
Drop all the A / An prefixes in the descriptions.
Consistent and correct naming. For example, Node.js, not NodeJS or node.js.
Per https://github.com/sindresorhus/awesome/blob/master/pull_request_template.md
grabear/awesome-rshiny